After a marathon final day, Patton Kizzire beat James Hahn at the sixth extra hole to win the Sony Open at Waialae in Hawaii.
Kizzire, who claimed his second win of the new 2017/18 wraparound season, closed with a 2-under-par 68 to finish at 17-under, but that 72-hole total was matched by Hahn, who burst through the field with a closing 62 that included five straight birdies.
I played good enough to win, but I didn't.James Hahn
The two Americans traded a pair of birdies and three pars in the play-off before Hahn missed an eight footer for par to leave Kizzire as the last man standing.
Tom Hoge finished a shot back having held the lead with three to play before double bogeying the 16th hole. Webb Simpson, Brian Harman and Brian Stuard shared fourth spot on 15-under, two back.
"Today was a battle. I didn't have my best stuff," said Kizzire. "It was a wild week. It was a wild day. I didn't exactly make as many birdies as I would like, but it was kind of a survival mode. That play-off was quite a marathon.
"James played amazing to get in the play-off, but it was nice to come out on top."
A disappointed Hahn reflected: "I played good enough to win, but I didn't. If I'm not coming out of the room with the trophy, it really feels like I was defeated out there.
"I mean, I had a putt to win it. I'm going to be playing that over and over and over again, you know, just things that I do. Just become obsessed with trying to win again."
Defending champion Justin Thomas was another who felt the title got away from him.
"I easily, easily could have won this tournament by a pretty good amount of strokes. So that part's a little upsetting," said Thomas, who finished five behind the winner.
Thomas is 11.00 to win April's Masters at Augusta and 19.00 to land the Open Championship at Carnoustie.
View all Golf betting