In Game 4 of the Western Conference finals, James Harden turned in the playoff performance of his career to help his Houston Rockets stave off elimination. In Game 5, though, the Rockets' superstar made the wrong kind of history. [ Follow Dunks Don't Lie on Tumblr: The best slams from all of basketball] Harden, one of the sport's most talented ball-handlers and playmakers, committed an almost unthinkable 13 turnovers in Houston's season-ending loss to the Golden State Warriors on Wednesday. That sets a new NBA record for most cough-ups in a single playoff game. Former New Jersey Nets guard John Williamson held the previous high-water mark, giving it away 11 times in a loss to the Philadelphia 76ers in an first-round playoff game back in 1979. He became the first player to turn the ball over more than 10 times in a playoff game since ... himself, in Game 4 of Houston's 2013 first-round playoff series against his former team, the Oklahoma City Thunder. Only five other players in the last 30 years have reached double-digit turnovers in a playoff game — LeBron James (twice), Tim Duncan, Kevin Garnett, Penny Hardaway and Kevin Johnson. (At least Harden's in excellent company, I...