By Helen Ross, PGATOUR.COM
LA QUINTA, Calif. -- Roberto Castro, who leads the Humana Challenge in partnership with the Clinton Foundation, has just made the turn as the second round continues.
Castro, who opened with a 63, shot 4 under on the back nine of the Palmer Private course and now stands 13 under for the tournament. He's two strokes ahead of rookies Lee Williams and Russell Henley, who won last week's Sony Open in Hawaii.
Williams is playing the Nicklaus Course and is 6 under through 11 holes. The red-hot Henley is through eight holes on the Palmer Course and is 3 under for the day.
The other players in double figures at 10 under are overnight co-leaders Jason Kokrak and James Hahn, Kevin Stadler, Ricky Barnes, Scott Stallings and Charley Hoffman.
Phil Mickelson continues to battle after opening with a round of even par. He's played 12 holes on the Nicklaus course in 4 under after making six birdies, two bogeys and four pars.