C.T Pan secured his maiden PGA Tour title by claiming a narrow one-shot victory at the RBC Heritage.
The 27-year-old posted a four-under 67 at Harbour Town to set the clubhouse target and finish a shot clear of Matt Kuchar, who birdied the last to match Pan's round and get to 11 under.
Shane Lowry ended tied-third alongside Patrick Cantlay and Scott Piercy, with Seamus Power in the group three strokes off the pace in tied-sixth.
Beginning the day two strokes behind 54-hole leader Dustin Johnson, Pan opened with four consecutive pars before following a tap-in birdie at the fifth with back-to-back gains around the turn.
Pan birdied the 12th but dropped a shot at the par-five 15th after failing to get up and down from a greenside bunker, only to bounce back by rolling in an eight-footer at the next to get back to 12 under.
The world No 113 scrambled from a bunker to save par at the 17th and tapped in for par at the last after lipping out with his birdie effort, leaving Cantlay requiring a final-hole birdie or Lowry to eagle the 18th to extend the contest.
A two-putt par at the last saw Lowry close out a one-under 70, while Cantlay almost pitched in from just off the green but then missed his six-footer for par to slip back to 10 under.
Lowry had started the day one back and briefly moved ahead after three birdies in his first six holes, only to miss a four-footer to save par at the ninth and then double-bogey at the 12th.
Johnson's challenge ended abruptly after the world No 1 racked up three bogeys and two double-bogeys in a five-hole stretch from the 11th, with a 30-foot birdie at the last closing a final-round 77.