McCoy, after completing 16 of 27 passes for 110 yards and running 25 yards on seven carries in a 27-25 win over Texas A&M, took over the No. 1 spot. McCoy started and played most of the game, but the Longhorns have had a revolving door at quarterback all season.
Garrett Gilbert began the season as starter after winning the offseason quarterback battle. He was benched midway through the season's second game and eventually transferred to SMU after undergoing shoulder surgery.
Since then, Ash and McCoy have split the starter role. Ash, a true freshman, has had significantly more playing time until a string of five games midseason where he had no touchdowns and six interceptions.
McCoy threw the ball 16 times (the same number as Ash) against Kansas State, tied for his highest total this season before throwing it 27 times against Texas A&M. Ash didn't have a pass attempt, but entered the game on a handful of plays.
McCoy has yet to throw an interception this season.
Looking around the league, the trend at Texas is troubling. The Longhorns are the only team doing the quarterback shuffle.
Here's how the rest of the league has handled their quarterback situation.
Iowa State: Started Steele Jantz for the season's first seven games, benched early for Jared Barnett in a loss to Texas A&M. Barnett started the next four games, winning three, including an upset of No. 2 Oklahoma State.
Kansas State: Collin Klein started 11 games and will start this week, rushing for 1,013 yards and 25 touchdowns, and throwing for 1,587 yards, 11 touchdowns and 5 interceptions.
Missouri: James Franklin started all 12 games, throwing for 2,740 yards, 20 touchdowns and 10 interceptions and rushing for 839 yards and 13 scores.
Oklahoma State: Brandon Weeden started all 12 games, ceding to Clint Chelf often in blowout wins.
Texas A&M: Ryan Tannehill started all 12 games.
Not a good sign when the Big 12's best recruiting school can't settle on a player at the game's most important position, especially when every other team in the league hasn't had any troubles in that area.