In May 2011, Choi won The Players Championship at TPC Sawgrass in a playoff against David Toms. Choi had a one shot lead going down the 18th hole in regulation time, but Toms made birdie while Choi could only chip and putt for a par taking it to a sudden-death playoff. Both players found the green at the first extra hole, the 17th, and then missed with their attempted birdie efforts. Toms however also missed the return four footer for par leaving Choi with a three-foot par putt to seal victory. This to date is the South Korean's biggest PGA Tour victory. Following his win, Choi donated $200,000 to help victims of the tornadoes that ravaged the southeastern United States in April.