Luke Donald will wonder what might have been after American Charley Hoffman, ranked 132nd in the world, produced the performance of his life to win the second of the FedEx Cup play-off events in Boston.
England's Donald lead by two seven holes into his final round in the Deutsche Bank Championship, but Hoffman was in a league of his own.
The 33 year old with only one win in his previous 297 US PGA Tour events had an incredible 11 birdies for a closing 62, his career low score, and five shot victory.
Nobody else on the day scored better than 65.
Donald, one of Colin Montgomerie's three wild card picks for The Ryder Cup, went to the turn in 33, but had a hat-trick of bogeys from the 14th and fell back to joint second with Australians Jason Day and Geoff Ogilvy.
Hoffman was four behind Day at the start of the day, but started to make his presence felt with four successive birdies from the second.
He also turned in 33, but after another birdie at the tenth he hit the flagstick on the par three next and then sank a bunker shot at the 13th.
That took him one in front and, far from buckling under the pressure, he picked up more shots at the 15th and 16th and put the icing on the cake with a two-putt four on the 528 yard 18th.
"I actually didn't know how many birdies I had," he said. "The ball just kept going in the hole, It was a really fun day.
"I was just trying to keep the pedal down. I didn't have a clue.
Donald, who has now had 27 top ten finishes since his last win in America four-and-a-half years ago, lost his normal accuracy on the back nine.
He three-putted the 14th and 16th and in between could not recover from driving into sand.
The World Number 11 did at least come back with birdies on the final two holes for 69, though, and got an unexpected second when Day closed with a bogey six.
