Rookie Dustin Johnson charged past a pack of likely last-round contenders to win the Turning Stone Resort Championship with a three-under 69.
The American got the better of six other players - including Londoner Brian Davis - who all began today hoping to record the first tour title of their careers.
Instead Johnson sunk an eight-foot birdie putt on the final hole at Verona, near New York, to edge out veteran Australian Robert Allenby by one shot.
Allenby, seeking his fifth victory and first since 2001, was denied when his 12-foot last-gasp putt for a birdie to tie with Johnson stopped just short.
Home hopes Tag Ridings, Kyle Thompson and Jeff Overton and Australian Jason Day were among those who just ran out of steam.
Davis hit a 74 to finish on a five-under 283 and tie for 15th - having started the day third.