Dustin Johnson scored a bogey at the final hole of the PGA Championship to fall into a share of the lead with Bubba Watson and Martin Kaymer at 11-under par.
Needing a par to claim his first major golf title, Johnson pushed his tee shot wide right and left his second shot in rough to the left of the green. He missed a putt for par from about six feet to finish with a round of 71.
A playoff will determine the winner.
The champion will be the golfer with the lowest score after playing the 10th, 17th and 18th holes. In the event of a tie, the 18th will be repeatedly played until a winner emerges.
The three finished one shot ahead of Rory McIlroy and Zach Johnson.