SCOTTSDALE, Ariz. — Webb Simpson was in big trouble when he drove into the right-side water on the par-5 15th.

“I didn’t think it was over,” Simpson said. “But I thought, ‘I’m going to really have to do something special to get back in it.”’

He did — at friend Tony Finau’s expense Sunday in the Waste Management Phoenix Open on a TPC Scottsdale course that played tougher with firm greens and a touch of wind.

Simpson birdied the final two holes of regulation to force a playoff with Finau, then won with a 10-foot birdie putt on the first extra hole.

Two strokes ahead with two holes left, Finau missed an 18-foot birdie try in the playoff on the par-4 18th after driving left into the church pew bunkers.

Simpson two-putted for birdie from the fringe on the short par-4 17th and made a 17-footer for birdie from the edge of the green on the 18th. Finau, after hitting a 366-yard drive and an approach to 8 feet, missed a chance to win when his birdie try slid right.

Simpson closed with a 2-under 69 to match Finau at 17-under 267.

“Today was a lot different. Today played tougher,” Simpson said. “I thought the pins were very tough, by far the toughest day of pins, course was longer, we had wind. We hadn’t had wind all week, so everything today was harder.”

Finau shot 70.

“I hit good putts,” Finau said. “The first one I hit really good, I thought I made it. ... Second one, similar line, a little bit farther, decided to play a little bit more break and it didn’t break.”

Simpson won his sixth PGA Tour title and first since the 2018 Players Championship. The 2012 U.S. Open champion improved to 2-6 in playoffs, three years after falling to Hideki Matsuyama in extra holes at TPC Scottsdale. Simpson also lost a playoff in November.