As Louis Oosthuizen tumbled down the leaderboard Sunday, bogey after double-
bogey, Hunter Mahan remained steady. That, along with a few key birdies, was
enough for Mahan to hold on for victory at the Shell Houston Open. Mahan
carded a one-under 71 to finish at 16-under-par 272, one stroke ahead of Carl
Pettersson (71). Oosthuizen began the round with a two-shot advantage, but
stumbled to a three-over 75 and took third at 14-under 274. Phil Mickelson,
the 2011 champ, shot 71 to share fourth place with Jeff Overton (68), PGA
Champion Keegan Bradley (71) and Brian Davis (74).
