Max Homa held his nerve in a play-off with Tony Finau to to win the Genesis Invitational in California.
The American carded a closing five-under 66 to finish on 12-under overall alongside Finau, who had produced a fantastic seven-under 66 to surge up the leaderboard.
On the second play-off hole Finau blinked first, sliding a putt left of the hole that meant Homa too the victory.
Homa had missed a three-foot birdie opportunity on the 18th hole to win the tournament in regulation, but he recovered from that to ultimately prevail.
Overnight leader Sam Burns was third, a shot behind Homa and Finau.
Burns' challenge was ultimately ruined by the barest of margins on his final homeward nine, with bogeys at 12, 14 and 15 leaving him to close at 11-under for the tournament, after Homa and Finau edged ahead of him.
Finau took the lead at 12-under with a superb seven-under 64. Homa joined his compatriot with a birdie at the 17th hole, before missing a three-foot birdie putt to win the title at 18, his 66 setting up the play-off.
After both men parred the first play-off hole, Homa set up the win with a sublime approach shot on the second, and with his rival having found the sand, the 30-year-old made birdie to Finau's par to claim his second title on home soil.
Homa, set to climb into the top 30 of the world rankings following the victory, was delighted to finally meet his idol and tournament host Tiger Woods.
"Been watching this tournament my whole life, just wow," an emotional Homa said in his post-victory interview on Sky Sports.
"Tiger is the reason why I'm in golf. I saw Tiger the other day but I was scared to talk to him, now he is forced to talk to me.
"I have a game that fits difficult golf courses. I think this is the best golf course in the world. I hope this is just the beginning."