Martin Breunig added 14 points for the Grizzlies (13-7, 8-1 Big Sky Conference).
Marcus Colbert had 21 points and Tyler Hall added 17 to lead Montana State (9-12, 4-5).
Sarp Gobeloglu made a 3-pointer to give the Bobcats their last lead, 64-63 with 5:30 remaining. Bobby Moorehead answered with a 3 and Oguine added a layup and the Grizzlies led 68-65. Colbert made two free throws and Wright made a layup to keep it a 3-point game. Colbert and Quinton Everett then missed potential game-tying 3s on the next possession.
Breunig made a layup and Oguine hit a 3-pointer to stretch the Grizzlies' lead to 75-69 with 49 seconds left. Wright made four free throws and Breunig added one more to seal it.