The Wells Fargo Championship winner three-putted the 72nd hole on Sunday to finish at 9 under and had to watch Roberto Castro salvage a par at the last to force overtime.
In the playoff, Hahn calmly two-putted for par after Castro hit his drive in a creek and made bogey. It was Hahn’s second victory on the PGA Tour, both in playoffs.
“To be given another opportunity to win the golf tournament, that really excites me,” said Hahn, who closed with a 2-under 70. “I take a lot from other sports and going overtime in basketball, there's just nothing else like it to have the game winning shot or the last putt to win a golf tournament.