American Jason Dufner erased memories of his stunning late collapse two years ago when he clinched his first major title by two shots in the 95th PGA Championship at Oak Hill Country Club on Sunday.
One stroke behind playing partner Jim Furyk overnight, the ultra-laidback Dufner produced some scintillating approach play on the way to a two-under-par 68 and a 10-under total of 270 on the challenging East Course.
The 36-year-old seized control with three birdies on the front nine and shut the door on his rivals with a steely display of safety-first golf over the difficult closing stretch.
A stunning approach to a foot at the par-four 16th earned him his fourth birdie of the day and he could afford the luxury of bogeys at 17 and 18, two of the toughest holes on the course, as he secured his third victory on the PGA Tour.
Dufner had lost out in a playoff to Keegan Bradley for the 2011 PGA Championship at Atlanta Athletic Club where he had led by five strokes in regulation while playing the fourth-last hole before losing steam.
Former US Open champion Furyk, bidding at the age of 43 to win his first major title in a decade, signed off with a 71 to finish alone in second place after struggling off the tee for much of a sun-splashed afternoon.
Rory McIlroy carded a final round 70 to finish on three under.
Tiger Woods, seeking to end a five-year title drought at the majors, ended a forgettable week at Oak Hill with a 70 to finish halfway down the leaderboard at four-over 284.