Derek Ernst beat David Lynn in a play-off to win the Wells Fargo Championship for his first PGA Tour victory.
Ernst birdied at the 18th in his final round to move to eight under alongside Lynn at the top of the leaderboard.
And the American took one hole to claim victory when the two went head to head in the play-off on the final hole.
Ernst hit the fairway with his approach, with his second landing on the green, some 15 feet from the hole.
It was in stark contrast to Lynn, whose second shot found the bunker, with his chip flying across the green - his second chip landed eight feet from the hole.
Ernst’s birdie putt just evaded the hole, but the 22-year-old, whose previous best finish was a tie for 47th at last week’s Zurich Classic of New Orleans, tapped in for the win
Phil Mickelson had bogeys at 16 and 17 that took him from one ahead to a shot behind before he missed a 19-footer for a birdie which would have taken him into the play-off.
Lee Westwood was close but dropped shots at three, 12, 13 and 17 to undo his good work following birdies at the first, fifth, 10th and 14th.