Jason Dufner is edging towards his first major title after Lee Westwood and Rory McIlroy quickly saw their hopes extinguished in the final round of the US PGA Championship at Oak Hill.
Dufner, who had equalled the lowest score in major history with his second-round 63, started the day one behind Jim Furyk but birdied the fourth, fifth and eighth thanks to some pinpoint approach play.
At 11 under par he led by two from Furyk with four holes remaining, the former US Open champion having made a costly bogey on the ninth by missing the green with his approach after hitting his first fairway of the day.
Swedish pair Henrik Stenson and Jonas Blixt were another shot behind with three holes remaining.
Paired together and six off the lead, Westwood and McIlroy would have been encouraged by what they saw from the early starters on a course playing 109 yards shorter than the first round and offering plenty of birdie chances.
The par-five 13th was reachable in two for the first time after the tee was brought forward 38 yards and McIlroy's fellow Northern Irishman Graeme McDowell was one of those to take advantage with a 66 to finish two under.
But although McIlroy birdied the third from long range, the defending champion missed from just three feet for another on the next and then came unstuck on the treacherous fifth.
The par four had already seen triple-bogey sevens from Open champion Phil Mickelson and Ryder Cup hero Martin Kaymer when McIlroy's approach span back off the green and onto the rocks on the edge of the water surrounding the green.
McIlroy was incredulous but had to troop over to the drop zone, from where he fired his fourth shot over the green and took three to get down.
The 24-year-old hit back with birdies on the ninth, 10th and 13th before a dropped shot on the 16th.
Westwood had already bogeyed the second and double-bogeyed the third when he found water off the tee on the fifth, and although he managed to drop just one shot, another bogey on the seventh soon followed.
The 40-year-old was seeking his first major title at the 63rd attempt after letting slip a two-shot lead going into the final round of the Open at Muirfield last month.
He also bogeyed the ninth but birdied the 10th and almost holed his tee shot to the 11th - where Tim Clark holed-in-one earlier - only to miss the resulting short birdie putt.