The Cowboys (17-7, 5-5 Big 12) put the game away with a 16-0 spurt early in the second half that started and finished with dunks by Matt Pilgrim. His right-handed jam began it, and the run only ended after he was called for a technical foul for hanging on the rim too long after a two-handed alley-oop slam that made it 67-43.
Oklahoma State eventually led 88-58 after Page's driving layup with 6:23 left.
Tommy Mason-Griffin led Oklahoma (13-11, 4-6) with 30 points, but 18 of those came after the Sooners were already down by 30. Oklahoma played without top scorer Willie Warren (illness) and top rebounder Tiny Gallon, who was suspended.