Genesis Open: As tournament host, finished 6-under and T15 in the Genesis Open, the only event on TOUR at which he has made double-digit starts and not earned a victory. Now has seven top-15s in 13 starts in this event. Made a 43-foot, 10-inch eagle putt at No. 1 in the second round, marking his longest putt made on TOUR since 2014 WGC-Mexico Championship. Played his first four holes of the third round 5-under (B-E-B-B) en route to a 6-under 65.
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.