Dustin Johnson made an "unbelievable" 45-foot birdie putt on his final hole to force a playoff but later Jon Rahm managed a flawless putt from 66 feet on the same 18th hole to win the US PGA Tour BMW Championship.
Jon Rahm has drained a swinging 60-foot birdie putt at the first playoff hole to win the US PGA Tour BMW Championship over world number one Dustin Johnson.
Spain's Rahm, ranked second in the world behind Johnson, was in the right rough off the tee at the first playoff hole, the 18th at Olympia Fields near Chicago on Sunday.
His second shot rolled to the back of the green, leaving him what could have been a tough two-putt for par.
"Never did I think I'd be making another 50-, 60-footer – couple of breaks in there, too – to end up winning it," said Rahm, who gave a roaring fist pump as the putt dropped.
Johnson's tee shot was also off course, but ricocheted off a tree to settle in the fairway. The American found the middle of the green, but after Rahm's miraculous birdie effort, Johnson's birdie attempt settled inches from the cup.
'Can't believe what just happened'
Johnson had snaked in a 43-foot birdie at the same hole to force the playoff, joining Rahm on four-under-par 276 in the second event of the US tour's FedEx Cup playoffs.
Rahm had powered to the top of the leaderboard with six birdies in an impressive six-under-par 64 – the lowest round of the week.
"I still can't believe what just happened, what happened the last hour of play," Rahm said.
"That stretch of waiting for DJ, him making the putt, going in the playoff, me making the putt, then trying to stay mentally in it just in case he made the last putt -- it's been a roller coaster but so much fun."
Johnson, seeking a second straight win and 23rd tour title, started the day tied for the lead with Hideki Matsuyama with Rahm three adrift.
He birdied three of his first four holes, but bogeys at eight and 10 saw him fall out of the lead before he picked up strokes at 15 and 18 to sign for a three-under 67.
Johnson's solo second place means he'll stay atop the rankings.
Rahm was tied for sixth starting the day after a third-round marred by a bad mistake at the fifth hole, where he absentmindedly picked up his ball on the green without marking it and was assessed a penalty.
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Tremendous course with a brilliant setup.— Jason Sobel (@JasonSobelTAN) August 30, 2020
Top two players in the world in a playoff.
A legit birdie bomb on the final hole of regulation, followed by an even bigger one in the playoff.
What a week. What a finish. What a win by Jon Rahm.
He said it wasn't hard to put the blunder behind him.
"Once I teed off today, in the good weather and how I started striping it the first few holes, I knew I had a chance," said Rahm, who claimed his fifth tour title and his second in his last five starts.
Rahm had two birdies on the front side, but picked up the pace with a 16-foot birdie putt at the 10th. He followed that with a five-foot birdie at the 12th and a nine-footer at 15 before he rolled in a 30-foot birdie at 16.
He wasn't surprised, however, to find himself in a playoff, and went straight to the range to keep warm with Johnson still on the course and just one back.
The reserved Johnson pointed to the sky then swung a fist as his playoff-forcing putt crested a hill, accelerated down, and curled in.
"Obviously I knew I needed to make birdie to get into the playoff," he said.
"I played an unbelievable putt, got in the playoff, and then Jon made an even more ridiculous putt on top of me."
Rising Chilean star Joaquin Niemann got off to a hot start with three birdies in his first five holes. A birdie at the eighth gave him a share of the lead, but he slowed with a bogey at 14 and finished with a 67 that left him tied for third on 278 alongside Matsuyama, who signed for a 69.
American Tony Finau was alone in fifth after a 65 for 279.