PGA Championship: Finished second at the PGA Championship, and for the first time in his career (was 14-0), lost a third-round lead in a major to winner Y.E. Yang at Hazeltine National. Led after each of the first three rounds, including by two entering the final round, but Yang chipped in for eagle on the 14th hole to take the lead and then made birdie on the 18th hole to shoot 70 and win by three. His final-round 75 was his worst score in the final round of a major when he was in the last group.
Surgery: Pulled out of next two PGA TOUR starts, the Genesis Open and The Honda Classic. Released statement: "My doctors have advised me not to play the next two weeks, to continue my treatment and to let my back calm down. This is not what I was hoping for or expecting. I am extremely disappointed to miss the Genesis Open, a tournament that benefits my foundation, and The Honda Classic, my hometown event. I would like to thank Genesis for their support, and I know we will have an outstanding week." In April, announced on his website he had undergone further back surgery. The operation was performed by Dr. Richard Guyer of the Center for Disc Replacement at the Texas Back Institute.