Round 1 at 2011 Shell Houston Open

1 of 7 Bob Levey/AP
Nick O'Hern shot a seven-under 65 to move into a tie for second Thursday at Redstone Golf Club.
2 of 7 Dave Einsel/AP
Steve Stricker opened with a solid round of 67.
3 of 7 Bob Levey/AP
Phil Mickelson shot a two-under 70 despite making a double bogey on the par-3 7th.
4 of 7 Hunter Martin/Getty Images
Anthony Kim got off to a rough start, making bogey on holes 9, 10 and 11.
5 of 7 Bob Levey/AP
Jose Maria Olazabal made six bogeys and one birdie in the first round.
6 of 7 Michael Cohen/Getty Images
Hunter Mahan shot a two-under 70.
7 of 7 Michael Cohen/Getty Images
Jhonattan Vegas was one over on the day but remains in the top 10 of FedEx Cup rankings.