stock, nbc bay area news. >> and tough a story for "the investigative unit," call the tip line at 888-996-8477. you can also e-mail us at theunit@nbcbayarea.com. oakland mayor jean quan is defending herself tonight to nbc bay area after a "new york times" interview cast her in a controversial light. nbc bay area's arturo santiago's in oakland to explain for us. arturo? >> reporter: well, diane, we're here at the art and soul festival in downtown oakland. this is where we were able to catch up with mayor quan and ask her directly about how she was quoted in "new york times" magazine. now, the mayor's office actually has a booth here at the festival. the magazine article is online, and the print version will be released tomorrow. it's mainly about the city of oakland being a refuge for radical america. now, part of it does look at the mayor's relationship with occupy oakland and the raid, the police raid on october 25th to clear the encampment. the article quotes mayor quan as saying, "i was out of town. they closed down the camp early and then overreacted. certain people in the police had tried to set me up before." now, when asked why she responds, "to send the message that they can do what they want." now, in speaking to the mayor this afternoon, she says the reporter asked if she thinks she was set up. >> and i said no. but he asked me, well, why -- he asked me about what people said. and then he used it as if i believed that. i've always taken responsibility for what happened on october 25th and i've always said, you know, i agreed on closing the camp. so it's nobody's else fault and i don't believe there's a conspiracy. >> reporter: now, the oakland police officers association tells nx bay area "it did not set up mayor up. it's too busy protecting the citizens of oakland, a city with a high crime rate." as for the person who wrote "the new york times" magazine article, he tells the "san francisco chronicle" that the article was rigorously fact-checked. he stands by the article. and that all of mayor quan's quotes are on tape. live in oakland, i'm arturo santiago, nbc bay area news. >> thank you, arturo. protesters in oakland damaged several buildings including president obama's campaign offices there, and nbc bay area's cheryl hurd us now with reaction on why some people believe police were caught off guard. >> reporter: we are at the art and soul festival in downtown oakland. and as you can see hundreds of people are flocking in and they are having a good time. but last night there was a protest at an inopportune time at an unlikely place. >> te didn't really look like protesters at first and they kept saying "for obama, for obama." it appeared they were saying that. but it turned out they were saying f obama. >> reporter: deniece williams says she was inside president obama's oakland campaign headquarters last night when protesters started breaking windows. >> one of them just kind of came out and he had like a slingshot and he just started popping the window. and like the shards of glasses came out and the rest of the crowd were like throwing paintballs. >> reporter: not only did they smash this window, they broke car windows belonging to people who may have been attending the first fridays event downtown. >> the first fridays is the biggest thing that ever happens to oakland, the first friday of every month. but you know, it only takes one rotten apple to spoil the whole barrel. and that's what happened last night. >> reporter: last night oakland was hoping to shine with planned art festivals, including the art murmur walk and the annual art and soul festival, which will attract thousands of people to the area. >> people say it's occupied. people say that it's the people that -- the cannabis people that are very upset with the attorney general. >> reporter: for shutting down pot clubs and oakland. >> because it wasn't really a good police presence with the amount of people that we had in first fridays last night. >> reporter: we got no response from oakland police for that comment today. but hayden williams says it's time for the community to police themselves. >> we've got to get ourselves out of this economy. we've got to fix this city up. and we need to do this ourselves. and then we'll let the politics be for themselves. >> reporter: the festival will end at midnight tonight. for the first time in the festival's history. organizers believe there will be no problems tonight or tomorrow. in oakland cheryl hurd, nbc bay area news. and in the santa cruz mountains firefighters are close to putting out a wildfire burning there tonight. the fire started around 7:30 this morning in a remote area near boulder creek. it's still relatively small. so far the fire has just burned about eight acres. firefighters say they expect to have it fully contained by nightfall. and to the east a red flag warning is in effect overnight in the sierra. the national weather service issued the warning for the tahoe area because of dry lightning storms there. the warning is in effect until 11:00 tomorrow morning. today is known in the olympic world as super saturday. that's because today is the busiest day of the olympics. there are 25 gold medal events. and don't worry, we're not going to spoil any events coming up tonight on primetime right now. nbc bay area's phil roger joins us from london with a look at all the action. hello, phil. >> reporter: hi, diane. it's day 8 here in london, a day where we saw the olympic debut of a barrier-breaking athlete and a gold medal for a tennis superstar. serena williams added gold to her already stellar resume saturday as she became only the second woman after steffi graf to win a so-called golden slam, an olympic singles title along with all four major tennis crowns. >> the gold rush continues for the u.s.! >> reporter: america's bryan brothers also took gold in the men's double competition. and at the olympic stadium history was made today as south africa's oscar pistorius, known as the blade runner, became the first amputee to compete in track & field in the olympic games. >> you know, all the guidance that i've got from my team has paid off and let me perform on the days when it matters. >> jamie lynn gray going for gold. >> reporter: the u.s. medal meter continues to click today including gold for jamie gray in women's shooting. >> it's just amazing to be standing on the podium and your flag is being raised in the middle. >> reporter: and controversy in box. for five hours the usa's errol spence thought his olympic dream was over. >> i felt look i worked and scored more shots. but you know, it didn't go my way. >> reporter: then spence's loss was reversed by boxing officials, who ruled that an array of infractions had gone uncalled. >> it's going to come down to the tape! >> reporter: in women's triathlon today a photo finish. switzerland's nicola spiri gw n gwynning by just 13 centimeters while the u.s. triathlete sarah groff placed fourth. 25 gold medals handed out today. the olympics' busiest day yet. this is a u.s. olympic women's diving suit. two u.s. women qualified for the gold medal round in diving today. and it's a busy night on nbc bay area tonight. you'll see women's volleyball. also a lot of action in olympic stadium with track & field and at the aquatics centre plenty of swimming tonight including what michael phelps insists is absolutely positively his last race ever. that's the latest from the olympic games. i'm phil rogers, nbc bay area news. reporting live from london. diane, back to you. >> phil, one quick question. we talked a whole lot about the weather the first couple of days and it's kind of fallen off. what's the weather like there? is it warmed up at all? >> reporter: diane, i will tell you something. because the wind has died down tonight, it's not bad in here. although it was very, very chilly about two hours ago. now, fast-forward for the next 48 hours. they promise us that on monday evening we're going to see a low of 48 degrees. and remember, when i speak to you, it's 2:47 in the morning here in london. so you know, they were projecting snowflakes on the stadium last night. seriously. and we may see those again monday night. >> that's just incredible. all right. thanks a lot, phil. grab a jacket and stay warm. >> thank you, diane. >> all right. thanks a lot. all right. also on primetime track & field events including the women's 100 meters, the women's heptathlon, and the men's long jump. and you can all watch it tonight, as phil mentioned, on nbc bay area from 8:00 until midnight. and stick around, won't you, for nbc bay area news at midnight, with more insight on some bay area athletes. and still ahead, evacuations, homes destroyed, and miles of burned land in middle america. the latest efforts to control several wildfires burning in oklahoma. and good evening. i'm jeff ranieri in the nbc bay area weather center. major cooling today from 98 in livermore all the way down to 737 and from 84 in san jose to 72. we're not only tracking fog but also a few sprinkles. we'll detail that weekend forecast for you coming up. not many people are going to say they have like olympians that they might have swim -- swam on the same team you that did. it's just really cool. >> it's the east bay swim meet, where more than a dozen olympic athletes got their start and new olympic dreams are just beginning. we'll take you there. firefighters in oklahoma are struggling to control more than a dozen fires that have burned much of that state. there's a state of emergency in all 77 counties in oklahoma. and in all more than 80 square miles have burned, and oklahoma's governor updated the damage totals today. >> right now we're in the prevention side. the firefighting side. once we get past all this and it calms down here in oklahoma, then we'll be doing a lot of assessments of how many structures have been destroyed, what the amount is of damage to the state of oklahoma. >> high winds are making it tougher to bring the fire under control. no deaths or injuries have been reported. california's reporting its first west nile virus death this year. the 88-year-old woman is from kern county. so far 10 people in california have ended up sick from west nile virus this year. officials say you can protect yourself by getting rid of standing water around your home, where mosquitos breed. and this just in. an amber alert is over for a teenage girl from monterey county. 16-year-old eunice serrato was reported missing last saturday. well, she and her boyfriend turned themselves in to border patrol agents today. juan salazar jr. is one of the suspects wanted in a double killing that happened saturday, the day an amber alert was issued for ser rato. deputies say the investigation into the double homicide is ongoing and more arrests are expected. the search for sierra lamar continued today with one of the biggest volunteer turnouts in recent weeks. about 60 people showed up in morgan hill to search for the missing teenager. roaringers are trying to get the word out that they still need help. they've been struggling to maintain momentum and interest. and one volunteer we spoke with today said they appreciate any help they can get. >> if you're not doing anything, if you have time, just come out for an hour. if the searches are on you can help here in the office here, in the front. we 2350need help. or even here just helping us do paperwork. >> sierra disappeared on march 16th on her way to her school bus stop in morgan hill. her body has not been found. the man accused of kidnapping and killing her, antolin garcia torres is due back in court at the end of this month where he may enter a formal plea. with san jose's new casino matrix opening next week customers of another gambling spot will have to say good-bye for good. san jose allows just two card rooms to operate within city limits. so by the time casino matrix opens its doors on august 8th, the garden city card room on saratoga avenue must close its doors. the two businesses have the same owners. right now we're going to check in with jeff ranieri on weather for us. what's going on, jeff? >> quite a bit cooler out here for today, diane. we did have 68 in fremont, 68 in san rafael, and also just 65 in santa rosa and then we did get up close to 80 degrees in livermore with 77 officially and also 80 in the almaden valley. it's not take long for these temperatures to drop off. we've got a lot of marine layer, a lot of onshore flow this afternoon. already 61 in san francisco. 67 in san jose. and currently 69 in livermore. let's take you out live to hd sky camera network. and what you'll see in san jose is we have some mid-level moisture, enough that it's producing what we call virga. it's rain in the atmosphere. but the lower levels are too dry to let that touch the ground. meant, in san francisco we can't rule out some drizzle for tonight. it is fogged in. can't even see the tocchet transamerica building at this hour. let's bring you back to the weather boards and what we're finding here is plenty of low cloud cover across the east bay and also along the coastline. that's not going to budge for tonight. also with the moisture we're showing you we're finding a few areas of showers across the north bay hills. nothing major. trace amounts. we may see a little drizzle for tonight with this low cloud cover. across lake tahoe we talked about the potential for some showers yesterday and right now we have that happening. may even get a few more stray lightning strikes as we continue for tonight. overall we were under this kind of unusual weather pattern right now with at least this cooler weather and the wetter weather in parts of california. high pressure in the next 48 hours that's going to warm temperatures up and get a little above average in the seven-day forecast. it's going to be a gradual warning. we're not going to go totally hot by sunday. we'll start with morning fog and drizzle. as we head into monday we'll get some warmer weather. for sunday we'll be on the cooler side in napa with 77. 74 in san rafael and a mix of 60s and 70s from san francisco to redwood city. and we should hit right around 8 80 degrees in san jose. and of course the olympics right here on nbc. and tomorrow we are looking at some beach volleyball events. chance of a shower. temperatures in the 60s. and we'll keep that chance of a shower for monday, tuesday, and also for wednesday. and volleyball of course we're going to be watching those courts tonight when we do have competing, well, saratoga's own kerri walsh. also playing on top of tons of sand out there, a total of 3,000 tons of sand was delivered to those volleyball courts. on your seven-day forecast, which you'll find temperatures warming up as we head throughout monday, tuesday, and also wednesday. with plenty of upper 80s to near 90 degrees. so if today was too chilly for you, it's summer on that seven-day forecast. it will be back before you know it. >> it was too chilly for me. so i'm glad to see that. >> me too. >> thank you, jeff. >> sure. coming up, the most decorated athlete of the olympics, michael phelps, swims his final olympic race tonight. you'll see it on primetime. but first some of these bay area swimmers explain to nbc bay area how he's forever changed the sport. michael phelps swam in his final race of the london games today. don't worry, we're not going to give you the results right now since the race will be aired during primetime tonight. this is video from last night's 100-meter butterfly final, where phelps notched his 17th gold and 21st career olympic medal. the most decorated olympian of all time is hoping to cap his career with a gold medal in the 4x100 medley relay, a race the american has never lost. his colleagues, including bay area native natalie coughlin, says phelps' career has forever changed their sport. >> i think we take him for granted. and you know, there's been some talk that he hasn't swum as well as he could have at this games. and i would completely disagree with that. he just set the bar so high in beijing with those eight gold medals that i don't think that's ever going to be passed. >> he has really brought something onto the scene and gotten so many more people involved and fans of the sport, which i think is awesome. and what he's done is incredible, and it's helped people kind of rethink the impossible and rethink what they can do and how they can push themselves. >> missy franklin has certainly done that as well. swimming the anchor leg of the medley relay is cal's own nathan adrian. adrian won his first individual gold earlier this week in the 100-meter freestyle, beating out the competition by .01 of a second. of course you can catch all the action here on nbc bay area starting at 8:00 tonight. olympic dreams all start somewhere. and for more than a dozen olympic athletes they started with an east bay swim meet. nbc bay area's kimberly tere has more from a swim meet in moraga where she talked to children about their inspiration. >> reporter: kids all know the history of this swim meet where 17 olympians have emerged. they say the dream is possible and within reach. >> not many people are going to say like they have olympians that they might have swim -- swam on the same team that you did. it's just really cool. >> it's inspiring to know we can do that too if we put the energy and work into it. >> children of all ages. >> reporter: 1,800 kids are competing this weekend in the 56th annual championship swim meet put on by the orinda moraga pool association. these kids say the olympics have been inspiring as they watch and cheer on team usa. >> it's really neat seeing that sport that you can relate to taken to the next level and like knowing that it's humanly possible to do something that amazing. >> i'm really hoping it shows them that hard work and dedication can pay off either at an olympian level if that's what they want to, do if they want to become an olympian or just to learn to work hard in all aspects of their life. >> do you ever think that maybe you can be in one of those pools? >> maybe. but i'm not really planning on it, but -- >> reporter: these kids are no stranger to the commitment it takes to be a good swimmer, let alone the chances of making it to the olympics. but for some just the fun of it is enough. >> i love hanging out with my friends and doing the workouts. >> i just love the whole social aspect of hanging with your friends. the coaches are nice. it's fun to go to the meets and pop your time. even if you don't, it's still fun. you can learn from your mistakes and just get better every time. >> reporter: these kids say they're motivated, not just by the olympic athletes but also by each other at these meets. in moraga, kimberly tere, nbc bay area news. >> very nice. all right. coming up, in this family the love of baseball isn't just passed from one generation to another. it is shipped all over the world. and our bay area proud exclusive, we'll meet one family doing just that. plus, a thank you that backfired in a big way. why southwest airlines customers are frustrated with a company that bills itself as being customer-friendly. and our exclusive coverage of the olympics continues. we're live from london with more on the big names to watch for tonight in primetime. many of them are bay area athletes. for a preview of the best events to catch we're joined by nbc's mark barger in london. hello, mark. >> reporter: good evening, diane. yes, it's been a great day here in olympic park. as you alluded to, the busiest day of the games so far for medals. we just had a ton of people in the park. and they're all anticipating the finale of swimming. or at least a lot of them are. it would be the farewell for michael phelps, the most decorated olympian ever. will be swimming in his final olympic race tonight. the 4x100 medley relay. phelps will be swimming the third leg of that race along with nathan adrian, who is from uc berkeley. adrian will actually be swimming the anchor leg of that relay as he tries to bring it home for victory. if phelps gets the medal tonight, it would be the 22nd of his career and the 18th gold potentially of his career. also tonight in swimming the women's medley relay will be contested. missy franklin, the wonder girl of the swimming events so far in these games, will be swimming the lead-off leg in that event. she's going after her fourth gold of these games. she'll hand off to rebecca soni. and then it will be another uc berkeley product, dana vollmer, in the third leg, followed by allison schmitt, who will swim the freestyle to try to wrap up the medal for the ladies. we also have beach volleyball tonight. kerri walsh jennings, the bay area star, will be teamed with misty may-treanor once again. they go for their 17th straight -- i take that back. they have won 17 straight olympic matches. they will go for number 18 tonight as they bid for a spot in the quarterfinals against the netherlands. kerri's battling a case of pinkeye. but she's also kind of fueled up right now because they lost a set earlier this week. and she'd like to bounce back with a straight set win tonight to put them in the quarterfinals, diane. >> i bet she does, mark. she's not used to losing a set. listen, what's the atmosphere like over there -- >> reporter: that's right. >> -- at the olympics with the main stadium now opened up for track & field? did that change things up at all? >> reporter: it really has. there's an extra surge of electricity going through the crowd. we've had 200,000 people in olympic park the last two days. 80,000 of those packed into olympic stadium watching the track & field activities. there's a constant roar coming out of the stadium that just fills the entire park. that's at one end of the park. then you have a large viewing area almost like a live concert venue at the other end of the park where people can watch action on a large screen. and you've got tens of thousands of people watching action there. and so between the two it's almost like stereo crowd noise that just, as i said, just amps up the crowd. and it's been really electric here the last two days. >> that's got to be great. i'm a little bit jealous. thanks a lot 37 we'll catch up with you later. former stanford diver cassidy krug hits the pool again tonight in the semifinals of the 3-meter springboard diving event. she got off to a little bit of a rough start last night but still managed to score well enough on her dives to advance. she finished tenth in the prelims there. krug, an 11-time u.s. national champion, came up short in the bid to make the olympic team in 2004 and 2008. she says to finally be competing in the olympics is a dream come true. >> it's been a dream of mine for a long time and a goal of mine for a while also. and to actually be able to go and see how my best stacks up against the best in the world is an amazing opportunity. >> she will dive tonight in primetime for the chance to compete for a medal in the finals tomorrow. today more athletes were kicked out of the london olympics after testing positive for drugs. a runner from morocco and a belarus hammer thrower are both suspended for doping offenses. and a colombian 400-meter runner is provisionally suspended, that is, for a july 26th positive test for testosterone. also a russian cyclist has been disqualified from competition after testosterone was found in her system during a july 24th test. the international olympic committee says it will continue to crack down on doping. >> the only thing i would say is that this is a form of cheating. no one wants to see that. it spoils the games in that respect. and we have -- we fight against it. the president of the ioc has made it clear it's one of his priorities. >> today suspensions come on the heels of doping allegations against the 16-year-old chinese swimmer as well. she came under scrutiny when she blew her competition away earlier this week. she even finished with a time faster than ryan lochte in one event. she was cleared to continue, but bay area olympian natalie coughlin says that speculation about chinese swimmers is warranted. >> the chinese have cheated in the past. systematically cheated in the past. so it's a reputation that they've earned. but as long as they continue to produce swimmers that are clean and that, you know, take part in all of the wada and usada and fema drug testing pools that reputation eventually will go away. >> she was tested by olympic officials after her first two wins. all tests came back negative for any drugs. olympic gold may not be enough to save an athlete's parents, though, from losing their home. the parents of u.s. olympic swimmer ryan lochte are facing foreclosure in florida. according to a lawsuit filed by citimortgage the bank wants to recoup about $250,000 from the lochtes. the couple divorced last year, but both have been in london this past week to watch their son compete. and today a first for a u.s. olympic team but it's not one they're going to be celebrating much. the united states men's water polo team lost for the first time today falling into second place in their bracket. serbia beat the u.s. 11-6. the u.s. had won each of its first three matches before today's game. and serbia remains undefeated at this point. there are four water polo players with local ties for team usa. four are stanford grads. and there's also a cal bear there as well. meantime, a bay area olympian helped the u.s. team score a bronze medal in the men's four rowing eventual. today, that is scott gault and his teammates finished behind great britain and australia. it marks the first time the u.s. has made the podium since the 1992 games in bronze lowa. the event has each of the four rowers per team pulling on a single oar on a course that's a mile and a quarter long. serena williams has already accomplished so much throughout her tennis career, and today you might say was the icing on the cake. she won her first olympic gold in singles. that cause for major celebration in her hometown of compton. ted chen from our sister station in l.a. has that story for puss p. >> reporter: when serena williams won her first singles gold medal this morning no one was more excited than richard williams no, relation. he's a coach at the williams academy in baldwin hills. he marveled as serena dominated russia's maria sharapova. >> i was hoping it would be a little more competitive. but still the main thing is she won. >> reporter: the win gives williams a career golden slam. she won wimbledon last month and has 14 grand slam titles in her career. it's a career that's inspired many people to take up tennis and adults to pick up their rackets again. jasmine cannic became a tengs fanatic at serena's prompting. she did a profile on williams for "ebony" magazine and says serena's roots in compton make her appealing to many southern californians. >> you go, girl. she always represents well. being from compton and having that background and just looking at your hometown favorites go around the world and represent well, it really makes you feel good inside to know that she started from the same humble beginnings as a lot of us. >> reporter: williams says serena and venus williams created the teaching center to give back to a community that's given them so much. pictures of the sisters adorn the wall of the clubhouse and the young players are taught if you work hard enough you never know. coach williams says the gold medal is special. >> it's good because you win it for your country. that's the essential thing. you win it for -- serena won it for america, for the united states. so that's the main thing. >> again, that was ted chen reporting. and it's not just athletes that have invaded london. celebrities as well. there are some of them. to look at who all you have to do is go to our website, nbcbayarea.com, and then you click on celebs at london 2012 toward the top center. you'll find photos ranging from royalty and heads of state to skateboarding champs and movie stars. well, an effort to thank airline passengers is backfiring big-time for southwest airlines. the airline tried to thank its facebook friends with a half-price ticket sale on friday. but the effort is leaving passengers a little bit angry after customers were accidentally billed multiple times. in fact, one passenger tells us she was billed for 35 tickets, more than $9,000. >> i was outraged. and the scary thing is i know it's not just me. when you go on their facebook page, you can read posts of other people who have been charged multiple times. >> southwest says a technology glitch is to blame for the duplicate billing. so far the airline won't say how many customers were affected. governor jerry brown has a plan for state park spending that does not include refunds for some upset donors. over the past year millions of dollars in donations have poured in to the state capitol to keep state parks from closing. but donors recently asked for their money back after millions of dollars of hidden funds were found tucked away by the state parks department. the government says he wants lawmakers to spend $20 million of that newfound money on repairs and a matching fund to solicit new donations instead of giving money back to the donors. people got a chance to experience a little bit of the olympics right here in the bay area today. the annual fremont festival of the arts stepped off, and our own mike inouye was there. >> you guys have heard of the olympics, right? we have an olympian from the beijing olympics. >> reporter: nbc bay area's the sponsor of the event. today there were gymnastics demonstrations. check it out. their skills are very impresve. as well as a contest where you can win an olympic-style medallion or take a picture with a london backdrop for your facebook photos perhaps. the fremont festival of the arts continues tomorrow. it starts at 10:00 in the morning, runs until 6:00 in the evening. and still to come, faster and stronger. our olympics coverage continues with the trainer giving cal swimmers an edge in the london games. >> we really like the feeling of what it's like to help other people. so we want to keep this up for a long time. >> and south bay brothers looking beyond their neighborhood to improve the world. our "bay area proud" series focuses on a family turning others' trash into opportunities. parents make their children do chores around the house for all kinds of reasons, right? maybe to earn a little extra money. maybe a little self-reliance. but when a dad from san jose gave a simple chore to his two boys he did not expect it would change their lives. but it did. nbc bay area's garvin thomas shows us how a little cleaning job became tonight's "bay area proud." >> there you go. that's launched. who's got that? nice shot. out of here! >> reporter: a passion for the game of baseball is the kind of thing often passed from father to son. >> ooh, almost! >> reporter: our in darren leffler's case both sons. 13-year-old matthew and his older brother, jordan. >> nice shot. >> reporter: but in the leffler family love of baseball isn't just being shared from one generation to the next. >> oh, oh, oh! >> reporter: it's being shipped all over the world. >> you and i as adults understand that this is a huge thing. but i don't think they really understand the impact quite yet. >> reporter: our story begins two years ago. not with a game but a chore. jordan and matthew told to clean out the family garage. >> and we saw all our baseball equipment from the past. it was almost new. we just outgrew it. >> inside here they're all helmets. >> reporter: and if they had all this stuff lying around, the two reasoned, a lot of their friends' family did too. it was in that moment the idea for baseball buddies was born. >> we thought somebody else could use it. so we decided that we could all put our old equipment and then we could give it to someone that could use it. >> reporter: just this year alone the leffler boys have collected more than 100 pieces of slightly and often sometimes never used equipment. >> hardly any dirt on them. >> reporter: they have made shipments across the country, to mexico, even to africa, and are now on their way to personally deliver this shipment to an orphanage in honduras. >> i think it's going to be awesome. i think we're going to see a lot of smiles on the kids' faces. >> i put myself in their situation, and then -- if i get a new glove i'm like so excited to use it. >> drilled to left. >> reporter: and after making their donation jordan and matthew are going to stick around and hold a baseball clinic for the kids as well. who knows? through this gift of baseball -- >> nice play, nicky! >> reporter: -- these two may forever change someone's life just like they did theirs. >> we really like the feeling of what it's like to help other people. we want to keep this up for a long time. >> nice shot! >> reporter: garvin thomas, nbc bay area news. >> i hope they do. all right. sports is coming up next. henry wofford will join us with an update on, what else? baseball. giants under way right now at coors field. see if they can feed off last night's wins. >> i hope they do. i'm jeff ranieri in the nbc bay area weather center. a foggy chill for today, and that low cloud cover is still hanging around right now. we're going to talk more about that as a few areas of drizzle and also how long this chill will last in just a few minutes. welcome back to nbc bay area. last season the 49ers' run defense was one of the most dominant in the nfl history, shutting opposing rushers out of the end zone until week 16. that was very impressive. but that's not to say the 49ers' secondary doesn't deserve its fair share of recognition. mindi bach has more from the 49ers' headquarters in santa clara. >> reporter: with aaron rodgers, drew brees, and tom brady on the schedule this season, the 49ers' cornerbacks are expecting a challenging year. >> disguise is tomorrow when you're playing a quarterback. you're worried about the receivers as far as when he gets up the field what type of breaks he likes to make, what he like, what he doesn't like, press guy, off guy, stuff like that. but a lot of times you're playing against the look of the quarterback. >> reporter: to improve the quality of depth among the co cornerbacks the 49ers have adjusted the responsibilities of certain players, players like tremaine brock. >> he has some ability to play in the nickel package. we took that off his plate, and we want him to focus right now on becoming the best corner he can become. but he's another guy down the line that we could slide inside possibly. >> reporter: second year player chris culliver has taken on learning -- >> just learn both sides because if t.-brown or somebody go down i want to be able to show that i can play both and try to work that in there somewhere. >> reporter: while carlos rogers moves inside to play the slot in nickel and dime passengers, the 49ers have more options this training camp at that position. mu newcomers parish cox and michael thomas are getting those routes though terrell thomas is an option as well. mindi bach for nbc bay area. >> thank you, mindi. over to baseball, giants and rockies top of the first two, out, one on for buster posey. look out. once again, two-run homer for him. 16th of the year. first two runs of the game. in the top of the third melky cabrera at the plate with two out. and this is a solo shot for the melk man. his 11th of the season. that put the giants up 3-0. right now they're leading 6-1 in the seventh inning. blue jays and a's straight to the ninth. and 1-0 oakland. ryan cook, this guy who was lights out earlier this season, but all of a sudden we have a problem. giving up a home run to david cooper in the top of the ninth. ties the game at one. his fourth blown save in his last six attempts. this game went to extra innings. in the 11th jerry blevins strikes out. the a's find themselves logs the game 2-1. make it 3-1 is your final. all right. so far in london former and current cal swimmers, well, they have won nearly a dozen gold medals. we're going to have much more on that story a little bit later. that'll do it for now. that's all for now. >> all right. thank you very much, henry. you jumped on my story a little bit here. we'll make it work. all right. we've got some former cal swimmers winning some medals. nbc bay area's stephanie truong introduces us to the man behind the scenes that helps develop the tools that push those cal athletes to new heights. >> go. >> reporter: he rises before the sun does. >> it's nonstop. every day. >> reporter: fine-tuning his time. because for u.s. national team swimmer will copeland -- >> william copeland, who ekes out the win -- >> reporter: -- there's a fine line between a win and a loss. >> it comes down to like hundredths of a second. >> reporter: and that is where nick folker comes in. the former olympian has been the go-to guy for swimmers at cal for the last two olympics, pioneering new moves in the water and in the gym. he's conditioned and trained countless elite performers, including 12-time olympic medalist natalie coughlin. everyone's looking for the edge, especially when a fraction of a second can make all the difference. for example, the world record for the men's 100-meter backstroke now stands at 51.94 seconds, set on july 8th, 2009. breaking a world record that had been set just seven days before by less than half a second. >> in the old days we used to pound out yardage and that's all you would do. >> go. good. >> now a huge part of it is in the weight room. >> reporter: this is one workout he tailored for a make or break moment during a race, the start off the blocks. >> it's something that really works on the explosiveness off the start. >> reporter: he says new science has also spurred faster swim times, with research focused on exactly how to strengthen a dive into the water. it's so detailed it gets down to exactly when and where force is hitting the swimmer's body. >> because of that you see the muscle groups that are going to be under pressure and so you focus on that. >> reporter: folker says the sport's pom later has boomed largely thanks to michael phelps after his incredible 2008 run in beijing. >> they created a team around him that poured money into, one, his pocket but also into usa swimming. and from that it went into camps and clinics for younger kids and it mushroomed. >> i think that's great, to be able to reach more kids and get them into any sport, but especially swimming because i love it. >> reporter: as folker watches athletes he's trained for the 2012 games, he's already dreaming up ways to make the best even better. >> go. >> reporter: pioneering new workouts motivated by his love of the sport. >> we're not robots. there's no exact science. it's more of an art form. and i think if we can keep it like that it works. >> reporter: stephie truong, nbc bay area news. >> i do have to say i love that pool at cal. let's check in with meteorologist jeff ranieri. going to have some swimming weather coming up? >> eventually. today anything but that. somewhere in the east bay temperatures were quite a bit cooler than what we experienced this time last week. 98 in livermore on thursday. down to 77 today. and also san jose from 84 to 72. okay. let's get you back on the weather boards. it was all about this cooling fog that settled down a lot in the bay area for several hours today. only a small window of sunshine back in the east day. but here's the thing. we're starting to at least get some of this cloud cover pushing on out but as it does so it is squeezing out a few light showers up across the hills of the north bay. otherwise it's been relatively dry throughout most of the bay area. with these temperatures cooling off right now we still can't rule out a few areas of isolated drizzle for tonight. right now 61 in san francisco, 66 in sunnyvale and also 65 in san jose. as we bring you back into our fog picture, what we'll have is extensive low clouds up in the marina. also in the coastline. then as we head throughout the afternoon on sunday this is your window of sunshine for the weekend. looks a lot better as we head throughout sunday afternoon with everyone in the north bay down through the south bay expecting to get in on some sun. as far as your temperatures go, by the bay mid 70s and of course sunny skies as well expected as we just talked about for those interior valleys with mid 80s by the afternoon hours. all right. let's get your seven-day forecast in here. this is our last look, at least right now, and temperatures will begin to warm up. there's that summer warm-up, diane. temperatures in the low to mid 90s. >> that's what i like. >> that is good. day 14 of the olympics by next thursday. and speaking of the olympics, my colleague rob mayeda has been hosting "the olympic zone" all week. he's going to be joining us tonight. >> yes, he will. >> he's getting geared up. it's going to be an awesome show. >> busy day around here. thank you, jeff. >> sure. team usa's youngest gold medalist in london shares her secret. what pushed her to first place. he is 25 years old and considered the fastest man in the world, and this weekend we will find out if usain bolt, the jamaican track superstar, will set another world record. nbc bay area's bob redell set out to find out how fast he really is, and he met one man who says bolt is about to hit the human speed limit. >> world record! >> reporter: even a bolt of lightning has its limits. >> usain bolt is a great showman, but it's been three years now since he broke the world record. >> reporter: to break his 100-meter world record of 9.58 seconds -- >> look at the time! >> reporter: -- usain bolt would almost have to violate the laws of nature. >> 9.58. >> reporter: according to stanford biomechanics professor mark denny. >> the prediction is 9.48. >> reporter: by his calculations 9.48 seconds is the fastest man can run in 100 meters, which bolt is right up against. >> running that kind of speed is sort of inhuman anyway. >> reporter: no kidding. if you were to clock usain bolt with your car, the speedometer would briefly top out at around 27 miles an hour. >> what i did was go back to history to -- >> reporter: denny bases his human speed limit on historical running times. >> the probability of -- >> reporter: and a formula that takes about as much time to write as a person walking the 100 meters. >> it lets you predict really rare events given a small amount of data. >> i just realized something. i think this is a c. >> no. it's actually 1 over -- >> c, i think. >> reporter: do you think there is a human speed limit? >> yeah, you about -- >> i'm right here. >> yeah, but i think -- >> reporter: stanford runner spencer chase thinks man is better than 9.48. >> i take it kind of personally. you put a limit on it, like oh, that's a target. >> people don't like to hear that. people just assume that things are always going to get better and things are always going to get faster. at some point they can't. >> professor denny says look at horse, they haven't gotten any faster since the 1940s, dogs since the 1970s, women since the 1 1980s. he expects men to plateau within the next 10 to 20 years. >> i would love to have usain bolt or anybody else do better than that just so we know the human body can do something unpredictable. >> reporter: bob redell, nbc bay area news. >> we'll have to check that out. and finally tonight, did you see it? history was made in the pool yet again last night right there. the youngest american athlete competing it in london is now the country's youngest gold medalist. 15-year-old katie ledecky set a new american record last night, winning the 800-meter freestyle. >> walking out on the deck before the race, the crowd was amazing. and i just used all the energy that they were bringing and put it into my race. >> in addition to being the youngest athlete this year for team usa, ledecky is also the second youngest swimming medalist in team usa history. and coming up next on nbc bay area, we have rob mayeda hosting "the olympic zone," a behind-the-scenes look at the london games. we'll take a look back at the first week of competition and relive some of the most compelling moments so far. also, the women's water polo team features two bay area sisters who are key in the team's quest for gold. and the girls talk about their sixth sense. and we'll also hear from the man whose footsteps they're following. their proud, very proud dad. and after the olympic zone it's the olympic games in primetime. there are big events on tonight's super saturday schedule including, just in case you haven't heard, one last splash for michael phelps after all the action in the pool and on the sand and on the track, you've got to stay with us. we'll have a special edition of nbc bay area news that will include reaction from some of today's standout bay area athletes. we'll see you tonight around midnight. and thanks for watching. "the olympic zone," as we said, is next with host rob mayeda. i'll see you back here tonight at midnight. have a good night, and enjoy. find out why this man peddled for two years to get to the games. next on "the olympic zone. a very good saturday evening to you. welcome to the olympics zone. i'm your host rob mayeda. we're on day eight of the competition. this is the place to be for all things olympics over the next half hour. among the 529 members of the olympic team, there's a member whose brother is known for his skill as a weightlifter. holly mangold has determine nafgs her own. >>