Jim Furyk defeated Kevin Kisner on the second play-off hole to win the RBC Heritage title at Hilton Head and record a first PGA Tour victory since 2010.
The former US Open champion, 44, carded a superb final round eight-under-par 63 which included six birdies on his first nine holes to move ahead of overnight leader Troy Merritt, whose three-shot lead evaporated with a 69 on Sunday, when play was started early because of fears over the weather.
However, it was not enough to see off Kisner, who also tied at 18 under when he sank a birdie with his final putt.
After levelling the first additional hole with birdies on the 18th, it was Furyk who emerged victorious to claim the tartan jacket when he dropped in his second shot at the par-three 17th from 12ft after Kisner had come up short.
Merrit, who had hit a course-record 61 on Friday, finished third on 16 under, one stroke ahead of Brendon Todd with defending champion Matt Kuchar one further back.
US Masters champion Jordan Spieth ended tied for 11th at ten under following a closing round of 70, which included a double bogey on the par-three 14th after his tee shot went into the water.
Former Open champion Louis Oosthuizen was tied seventh after a 67 left the South African on 12 under.
Northern Ireland's Graeme McDowell ended seven under par after a final round 72, his worst round of the week after posting scores of 66, 69 and 70.
