Jason Dufner
Dufner won by shots at Oak Hill.

American Jason Dufner overcame Jim Furyk to claim his maiden major at the USPGA Championship at Oak Hill.

Dutner leapfrogged overnight leader Furyk to win by two shots after a final-round 68 to become the 18th different winner in the past years, while his fellow countryman could only shoot a one-over 71.

Swedish pair Henrik Stenson and Jonas Blixt finished on -7 and -6 respectively and defending champion Rory McIlroy ended on -3.

"I can't believe this is happening to me," said Dufner.

"To come back from a couple of years ago in this championship when I lost to Keegan in the play-off, to win feels really, really good. The last two holes were a little unfortunate. I wish I could've closed out with no bogeys but I am happy to get the job done. It's a big step for my career."

Furyk, 43, was seeking to add to recent major winners over the age of 40 and claim a second major championship 10 years after his win at the US Open but fell at the final hurdle.

"I needed to keep the pedal down and make pars there and keep the pressure on him and I just didn't do it," he said.

"If I could go back I would have to try and make par at 17 and 18 and try and put some heat on him.

"You have to take your hat off to Jason, some of his golf was incredible. He was hitting three iron shots all day to within a few feet of the hole."

An American dominated leaderboard had Scott Piercy, David Toms, Dustin Johnson and Zach Johnson all in contention on the final day, but Dufner held his nerve to claim his first major title.

He becomes the third first-time major winner in 2013 after Adam Scott won the Masters and Englishman Justin Rose was victorious at the US Open. Phil Mickelson won his fifth major at the Open Championship.