The junior will seek a medical redshirt for his 2013 season after playing in just three games. Ash was ruled out for the season in November while he continued to recover for a concussion initially suffered in a loss to BYU on Sept. 7.
Ash should receive that medical redshirt from the NCAA, granting him two additional years of eligibility. Whether he's able to complete a season and regain his abilities remains to be seen.
A healthy David Ash - though learning his third offense during his time in Austin - would give Texas a upper quartile FBS starter who represents a massive upgrade over any other option at the QB position and gives the Longhorns the possibility of redshirting incoming freshman Jerrod Heard.
Similarly, I'd expect Texas to take two QBs in 2015.
Shawn Watson is a solid developer of QB talent and Ash should benefit from his tutelage, similar to the strides he made under Bryan Harsin between his true freshman and sophomore years.
The black cloud looming over all of this is the uncertainty of head trauma and what it means for Ash's effectiveness and long term health.