Texas QB David Ash walks away from footballTexas quarterback David Ash ended his career following repeated concussion issues.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceTexas quarterback David Ash ended his career following repeated concussion issues. Add us as a preferred source on GoogleFollowLoading recommendations... Please wait while we load personalized content recommendationsPublished Sep 18, 2014 | Modified Sep 18, 2014SI STAFFShare on FacebookShare on XHome/College