JOHNS CREEK, Ga. (AP) — Jason Dufner has squandered a four-stroke lead over the final four holes, forcing him into a playoff against Keegan Bradley at the PGA Championship.

Dufner, who has never won on the PGA Tour, appeared to have it locked up when Bradley chipped into the water at the 15th and took a triple bogey.

But Bradley pulled himself together, making clutch birdies at the 16th and 17th holes. Dufner fell apart, beginning at the 15th when he dunked his tee shot in the pond right of the green. That began a stretch of three straight bogeys, throwing away what appeared to be a commanding lead.

Dufner managed to make par at the final hole. That left him tied with Bradley at 8-under 272, setting up a three-hole playoff at 16, 17 and 18.

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