After missing the last six games with recurring concussion symptoms, junior quarterback David Ash’s season is officially over.

Head Athletic Trainer for Football Kenny Boyd released a statement Monday:

“Though [Ash has] made a lot of progress, [the trainers] have not been able to clear him to return to competition. Due to the duration of symptoms, we are now at a point that we believe the best approach for him is not to return this season.”

Ash first suffered a concussion on Sept. 7 against BYU, causing him to miss Texas’ next game against Ole Miss. He returned on Sept. 21 against Kansas State, but only played the first half before being forced to leave with returning symptoms. He has not played since.

The junior quarterback enjoyed a strong start to the season, throwing for 760 yards and seven touchdowns against two interceptions while rushing for a career-high 152 yards and a score. He is expected to be ready for the start of the 2014 spring season.