James Hahn edged out England's Paul Casey and Dustin Johnson in a three-way playoff to clinch the Northern Trust Open at the Riviera Country Club this morning.
Hahn and Johnson were left vying for the title after Casey was eliminated in the second playoff hole.
The South Korean birdied the third to pip his American counterpart and claim a maiden PGA Tour win in the process.
The 33-year-old holed three birdies and two bogeys to card a round of 69 and finish level on six-under-par with Johnson and Casey.
Retief Goosen had taken a two-shot lead over Canada's Graham DeLaet into Sunday, but a miserable day saw the South African card a final-round 75 after shooting two bogeys and two double-bogeys.
Sergio Garcia was among those to finish in a four-way tie for fourth place, as the Spaniard joined Hideki Matsuyama, Keegan Bradley and Jordan Spieth on five-under.
Goosen, DeLaet, Kyle Reifers and Sang-Moon Bae finished up on four-under.
