Senior quarterback Clint Chelf turned in an impressive first half performance in a matchup of Big 12 contenders, giving No. 12 Oklahoma State a 28-10 lead over No. 24 Texas at halftime.

Chelf completed 9 of 13 passes for 132 yards and a touchdown while rushing for 75 yards and two touchdowns to account for the Cowboys’ first 21 points of the half. Oklahoma State added another touchdown right before halftime on a 43-yard interception return for a touchdown by senior cornerback Justin Gilbert.

The Longhorns scored their lone touchdown of the half on a 7-yard run by junior running back Malcolm Brown in the second quarter. Brown led Texas with 55 rushing yards on 16 carries in the half.

Texas (6-0) entered the game as one of two undefeated teams in the Big 12, along with No. 5 Baylor (5-0). Oklahoma State (5-1) currently sits third in the conference.

The Longhorns will receive the kickoff to begin the second half.