NORMAN — With two of Oklahoma’s best basketball players on the bench with sprained ankles, Tommy Mason-Griffin responded with what Sooners coach Jeff Capel called "one of the best performances I’ve seen in Lloyd Noble since I’ve been here.” Mason-Griffin scored 38 points Wednesday night and led the Sooners to an 89-84 Big 12 win over Iowa State in front of 6,412 people. The Sooners (12-8 overall, 3-3 Big 12) played without Willie Warren and Tony Crocker, but Mason-Griffin took up the slack with a record-setting performance. He hit 13-of-21 shots from the field, including 5-of-10 3-pointers. He also hit all seven of his free-throw attempts. Mason-Griffin’s scoring output was the most by a Big 12 player this season; tied for fifth-most in Big 12 history; and was biggest point total by an Oklahoma point guard since Mookie Blaylock scored 38 against Iowa State during the 1988-89 season. "I felt like the rhythm was there,” Mason-Griffin said. "Once I hit the second three, I was like, ‘I really need to get going.’” Capel said, "Tommy was incredible, and I had a feeling he was going to play pretty well.” Capel didn’t hide that feeling from his team as it prepared to play without its top two scorers. In the locker room before the game, Capel told his team they were going to win. He pointed to Mason-Griffin. "And he’s going to lead us,” Capel said. Capel pointed to Cade Davis, too. Mason-Griffin and Davis did it with scoring, helping the Sooners jump out to a first-half lead that swelled to as many as 20 points. At halftime, the pair combined for 32 points, as many as the entire Iowa State team (12-8, 1-4). The Sooners’ thinning bench forced Mason-Griffin to play 40 minutes and Davis to play 39. Mason-Griffin, who has sat just one minute in four games, played through cramps in both calves and his right hamstring. But he drained several pull-up jumpers in the second half to fight off a surging Cyclone squad that had six players score in double figures. "You always get tired,” said Davis, who finished with 24 points.. "But that’s how it should be.” Iowa State trimmed the lead to three points in the final minute, but the Sooners led the entire game. "Gutsy performance by our guys,” Capel said.