Jake Knapp is spending his weekends much differently now as a rookie on the PGA Tour, just more than two years after working security at a restaurant in his hometown that was also a late-night hotspot. A first-time Tour winner earlier this year, Knapp went into this weekend leading the CJ Cup Byron Nelson after a second consecutive 7-under 64 on Friday. At 14-under 128, he was a stroke ahead of Troy Merritt (62) and first-round leader Matt Wallace (66), and two ahead of Kelly Kraft (66).