Zach Johnson came from behind to deny Jim Furyk victory in the rain delayed BMW Championship with a brilliant bogey free final round 65.
Johnson recorded a two-shot victory over Nick Watney for a 16 under par total in Monday's fourth round, which was delayed due to bad weather in Illinois on Sunday.
Eight-time Ryder Cup player Furyk, who carded a historic 59 on day two, followed that with a two-under 69 on Saturday to take a one-shot lead into the final round.
But the 43-year-old, finished with a final round 71 to drop three strokes behind Johnson and leave him still waiting for his first title win since 2010.
Watney hit the lowest score of the day with 64 to move into contention midway through day four, but Johnson shot a six-under round and held on to claim the title.
Jason Day and Luke Donald both finished three strokes further back with a final score of 66 to sit alongside Hunter Mahan and Steve Stricker on 11 under par.
Keegan Bradley recorded his lowest score of the tournament with a fourth-round 66.
The American, who won the HP Byron Nelson Championship in 2011, finished on seven under par on Monday due to bad weather forcing an early end to play over the weekend.
Bradley finished two shots behind Tiger Woods, who did not register his best round, finishing with a 71 score to leave him on nine under for the tournament - with Sergio Garcia a further two shots behind Bradley after a final score of 72.
On Sunday, just six players managed to complete their final round with Rory McIlroy putting the finishing touches to his when the siren sounded for the first time.
Some players did return after a delay but the skies opened once more and, with greens soaked with falling water, everyone was told to go home and return on Monday. Twenty-two players had yet to swing a club at that point.
Graeme McDowell and McIlroy will not feature in next weekend's season finale as the Irish pair finished on six and seven over respectively.