Ash played just three games last season due to concussions.
Ash was 19-of-34 for 190 yards and a touchdown and ran for another touchdown in the Longhorns' 38-7 victory over North Texas on Saturday. Strong said Ash is being evaluated by the team's medical staff after he experienced headaches and dizziness late Saturday night. Ash sustained the injury on the first hit he took on Saturday.
According to Strong, Ash's family and the team's medical staff will discuss whether the quarterback should retire from football.
Texas's game against the Cougars is a rematch from last season. BYU won 40-21 after Texas allowed a school-record 550 yards rushing.
- Scooby Axson