He beat Chris Stroud with a birdie on the second extra hole of a sudden-death playoff. He entered the final round two shots back of the leaders, but shot a final round 66 to take the lead in the clubhouse before Stroud chipped in on the final green to force a playoff. In the playoff, after both players made par on the first extra hole, Duke played his approach to within three feet. Stroud, who was about 30 feet away, could not make a birdie, leaving Duke to convert from three feet for his first PGA Tour victory. He also reached a career-best world ranking of 70th after his win. In the 2016 Players Championship, Duke shot a 65 during the third round on Saturday May 14, 2016. Conditions were very difficult that day and this round was subsequently viewed as one of the best rounds ever played at TPC Sawgrass. “What course was Ken Duke playing today? Can anyone tell me? Was he playing across the road?” said Jason Day after his third-round 73. “I think that should be the course record.” "The greens were the fastest I've ever putted," said Russell Knox. "I looked up on the board and saw Ken Duke shot 65 and was like, what? That's the best round of golf ever, probably." He finished tied for third in the tournament, winning $504,000. Duke was one of the last players to retain his Tour card via earnings, an exemption the PGA Tour ended prior to the 2017–18 season. Duke was unable to retain full Tour status after the season and became eligible for PGA Tour Champions in January 2019. PGA Tour playoff record (1–0)  Nationwide Tour playoff record (0–1)  CUT = missed the half-way cut "T" = tied   CUT = missed the halfway cut "T" indicates a tie for a place  "T" = Tied