|Northern Trust Open leaderboard|
|-6 James Hahn (US)*, Dustin Johnson (US), Paul Casey (Eng); -5 Hideki Matsuyama (Jpn), Keegan Bradley (US), Jordan Spieth (US), Sergio Garcia (Spa); Selected others: -3 Vijay Singh (Fij); +6 Padraig Harrington (Ire)|
|*Hahn won at third play-off hole|
England's Paul Casey lost out in a play-off as American James Hahn won his first US PGA Tour title with victory at the Northern Trust Open in California.
Casey finished on six under with Hahn and Dustin Johnson but was eliminated at the second play-off hole.
Hahn, 33, then claimed victory when he sunk a 24-foot birdie putt at the next and Johnson missed his from 12 feet.
"I played great, I really did," said Casey. "I'm not disappointed in any shape or form."
The 37-year-old hit a three-under-par 68 in the final round, while Hahn and Johnson both shot 69.
Casey missed his birdie putt on the second play-off hole at the par-four 10th, while Hahn and 30-year-old Johnson both hit excellent shots out of the rough before holing out to progress.
"I didn't think I would have the longest birdie putt after seeing where those guys were,'' said Casey. "But those guys played phenomenal recoveries, absolutely brilliant.
"Dustin's was the toughest of the bunch. It shows he doesn't have just great length off the tee, he has great hands as well."
Hahn, whose wife is scheduled to give birth in three weeks, could barely watch as Johnson missed his putt on the next to give him a win which earns him a spot at the Masters at Augusta in April.
"Amazing," said Hahn, who was famous for his 'Gangnam Style' dance at the 2013 Phoenix Open.
"I birdied two play-off holes, against Paul Casey and Dustin Johnson, two great competitors. I'm lucky to be here now."
Spaniard Sergio Garcia had a one-stroke lead with two to play, but successive bogeys saw him miss the play-off by a stroke.
"I've always been truthful to myself and I didn't deserve to win this week. It's as simple as that," said Garcia.
"It caught up with me on the last six, seven holes. It was already a good effort for me to have a chance. Unfortunately, it's never nice to finish bogey-bogey. But I can't really be disappointed because I didn't play well enough."