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.
Mahan earned his fifth career PGA Tour title and second of the season, following his WGC - Accenture Match Play championship in February. He became the only multiple winner on tour this season, and next week will go for his first major title at The Masters.
Phil Mickelson, the 2011 champ, shot 71 to share fourth place with Jeff Overton (68), PGA Champion Keegan Bradley (71) and Brian Davis (74). That group ended at minus-12.
MORE TO FOLLOW.