Luke Donald's third shot, 18th hole, third round:
The 35-year-old former world No. 1, still looking for his first major, had been in command for much of Saturday, and had the lead when he stood on the 17th tee. A bogey there paired with Mickelson's birdie was just the start of his troubles. On 18, after landing in the deep rough with his approach, Donald attempted to chip out onto the green. Instead, the grass grabbed his clubface and the ball shot out low, running over the green. The double bogey would drop him to one over, two shots out of the lead heading into Sunday.
Morry Gash/AP Photo