World Golf Championships-CA Championship: Logged 56th career TOUR victory and 13th official World Golf Championships title in 24th start at the CA Championship at Doral Golf Resort & Spa. Held the 36- and 54-hole leads before closing out a two-stroke win over Brett Wetterich, marking the 39th time winning (in 42 events) when holding at least a share of the third-round lead.

The Open Championship: Captured his 11th major championship at The Open Championship, tying Walter Hagen for second on the all-time major professional championships list. Defeated Chris DiMarco by two strokes after holding both the second- and third-round leads. First back-to-back Open Championship winner since Tom Watson in 1982-83. Became 19th player to win The Open Championship three times. Posted his career-best opening 36-hole total in a major with his 12-under 132. Using a driver just once during the week due to hard and fast conditions, led the field in Driving Accuracy (85.7 percent) and was second in Greens in Regulation (80.6 percent).
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.
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