The top player in the world, who underwent neck surgery during the second round, shot an eight-under 64 to win the PGA Tour’s main event for the 50th time.
Xander Schauffele, Wyndham Clark, and fellow American Brian Harman were all within one shot of him at 20 under.
In a thrilling conclusion in Florida, all three missed putts to send the match into a play-off.
Harman shot the best round at Sawgrass, closing with a 68, but he missed a 17-foot birdie putt.
