OKLAHOMA CITY — Kevin Durant scored 31 points to finish the season as the youngest scoring champion in NBA history, and the Oklahoma City Thunder survived a sloppy second half to head into the postseason with a 114-105 win Wednesday night against the Memphis Grizzlies.

Oklahoma City let most of a 27-point lead dwindle away before closing out its 50th win of the season. The Thunder will meet the defending NBA champion Los Angeles Lakers in the first round of the playoffs.

Rudy Gay scored 25 points and Zach Randolph had 21 points and 11 rebounds for his 57th double-double of the season as the Grizzlies lost for the ninth time in their final 11 games.