Keenum connected on 32-of-46 passes for the Cougars (2-0). Bryce Beall rushed for 78 yards and a touchdown and caught a pass for another TD. Tyron Carrier caught seven passes for 111 yards and a touchdown.
Zac Robinson went 18-of-31 for 240 yards and a touchdown for the Cowboys (1-1). Dez Bryant caught five passes for 85 yards and returned a punt 82 yards for a touchdown for Oklahoma State. Beau Johnson rushed for 82 yards on nine carries with a touchdown.
Oklahoma State led 35-31 with 11:22 remaining in the game but the Cougars rallied with two unanswered touchdowns.