The shorthanded Grizzlies fell to the Thunder 115-110 in Oklahoma City. Jared Butler led the Thunder with 25 points. Tre Mann added 24.
The Grizzlies' Kenneth Lofton Jr. led all scorers with 42 points and grabbed 14 rebounds for a double-double.
The Thunder finish the regular season at 40-and-42. Oklahoma City will travel to New Orleans on Wednesday to battle the Pelicans. A win would advance the squad to a game on Friday to clinch the final spot in the western conference playoffs. Tipoff for Wednesday night's game is at 8:30 p.m.