Congratulations to Dustin Johnson on winning the St. Jude Classic.. Johnson won the St. Jude Classic on Sunday in his second event back after a back injury cost him nearly three months away from the PGA Tour, shooting a 4-under 66 that held off John Merrick by a stroke. It was Johnson’s sixth career victory as he prepares to head to California to compete in the U.S. Open after tying for 23rd last year at Congressional.