LOS ANGELES – Bill Haas wound up making the biggest putt of them all at Riviera.

On the second extra hole of a three-way playoff Sunday – made possible by clutch birdie putts from Phil Mickelson and Keegan Bradley on the final hole – Haas rolled in a 45-foot birdie putt across the 10th green to win the Northern Trust Open.

Haas closed with a 2-under 69 and won a PGA Tour event for the third straight year.

He was on the practice range, warming up for a playoff that didn’t look likely. Mickelson and

Bradley, the co-leaders going into the final round, were one shot behind on the 18th hole, which had given up only six birdies all day.

Haas, the FedEx Cup champion, moved to No. 12 in the world.

Mickelson, who rallied from six shots behind to win last week at Pebble Beach, was trying to become the first player since Tiger Woods in August 2009 to win back-to-back on the PGA Tour.

Mickelson missed three straight putts from inside 10 feet on the back nine – two for par, one for birdie – but atoned for it with his birdie on the 18th.

Bradley also missed a pair of putts from inside 10 feet down the stretch until coming up big on the 18th.