Webb Simpson birdied the last two holes of regulation, then birdied the first playoff hole to deny Tony Finau and claim his sixth US PGA Tour title at the Phoenix Open on Sunday.
Simpson nabbed his first title since the 2018 Players Championship, firing a two-under par final round of 69 on the TPC Scottsdale Stadium Course for a 17-under total of 267.
Trailing Finau by one to start the day, Simpson was two down through 16 but two-putted from 52 feet for a birdie at the par-five 17th and calmly rolled in a 17-footer for birdie at the 72nd hole.
Finau still had an eight-foot birdie look at the last hole of regulation that would have won it, but he couldn't get it to drop and the tournament went to a playoff for the fourth time in five years.
Once again, Simpson put his tee shot in the fairway on the way to another birdie. Finau, who was in a bunker off the tee, was left searching for an elusive second PGA Tour title to go with his Puerto Rico Open victory in 2016.
Finau had bounced back from a bogey at the eighth with an 18-foot birdie at the 12th and added another birdie at the 13th despite missing the fairway. But the American, who fired a nine-under 62 on Saturday, wouldn't find another birdie and settled for a one-under par 70.
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Simpson's chances of stealing the victory looked slim after he found the water at the 15th and bogeyed to fall two adrift.
Neither player could birdie the par-three 16th, the hole lined by stands holding thousands of raucous fans.
The pressure on Finau increased when he found a fairway bunker off the tee at 17 and Simpson bore down for the win.
"It was a lot today," said Simpson, the 2012 US Open champion. "Tony is a great champion. He played awesome today. To come down to the last couple of holes and then birdie 18 twice feels great.