LOS ANGELES (AP) — The 18th hole at Riviera had given up only six birdies to 73 players in the final round of the Northern Trust Open. Bill Haas convinced himself there would be at least one more to force a playoff.

The surprise was how it ended.

Two holes after Phil Mickelson and Keegan Bradley poured in birdie putts to set up a three-man playoff, Haas won with a birdie on the 10th hole when all he was trying to do was make par.

It was just under 45 feet, all the way across the shallow putting surface, and it provided a stunning conclusion right when thousands of delirious fans — including Jerry West, the tournament’s executive director — thought it couldn’t get any better.

“If I hit 30 putts, I maybe make five of them,” Haas said. “But it just so happens it did right there. I hit it just like I wanted. I hit the line. There was a ball mark about 10 feet in front of me. I was trying to go just around that, and I did that.

“ I’m not giving it all to luck,” he said. “I felt like I hit a nice putt. But from that length, anything can happen.”

On this day, just about everything did.

Haas started the final round two shots behind, making him the fourth consecutive PGA Tour winner rally on Sunday. He holed a 5-foot par putt for a 2-under 69 that looked like a winner when neither Mickelson nor Bradley, who shared the 54- hole lead, birdied the par-5 17th and came to the last hole needing a birdie to keep playing.

Haas won for the fourth time in his career, and it was his second straight win in a playoff. His paycheck Sunday was $1.188 million.