Jerry Kelly rallied with two birdies on the back nine to claim the $1.1 million payday at the Zurich Classic on Sunday.
Kelly offset bogeys on No. 8 and No. 10 with birdies on five, 11 and 14 for a 1-under 71 in the final round. He finished with a 274, one stroke ahead of three players.
It was the 42-year-old Wisconsin player's first PGA Tour title since he took two in 2002.
Charles Howell took advantage of Kelly's mid-round stumble with one of his six birdies on 11, which gave him a two-stroke lead. But bogeys at 15 and 17 left him with a 68 on the day, and he tied for second with Rory Sabbatini (67) and former Wolf Pack golfer Charlie Wi (68).