a-rod story. he not only witnessed him using performance-enhancing drugs but he, himself, injected him with the drugs. john berman tells us, a-rod is going down swinging. >> testosterone, insulin growth factor 1, human growth hormone and some different forms of peptides. >> give me a break, guys. >> reporter: a new damaging blow for embattled baseball star, alex rodriguez. the former chief of the now defunct anti-aging clinic telling "60 minutes" he personally delivered and injected rodriguez with banned substances. >> alex is scared of needles. at times, he would ask me to inject. >> you've injected him personally. >> personally? >> reporter: an arbitrator has banned him for 162 new games,