Texas quarterback David Ash will not play again this season because of a concussion, head coach Mack Brown announced Monday.
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Ash, a 6-foot-3, 220-pound junior from Belton, Texas, will be eligible for a medical redshirt and will have two seasons of eligibility remaining.
"Though he's made a lot of progress, we have not been able to clear him to return to competition," Longhorns head trainer Kenny Boyd said in a statement. "Due to the duration of symptoms, we are now at a point that we all believe the best approach for him is to not return this season."
Ash started three games this season, throwing for 760 yards and seven touchdowns with two interceptions and rushing for 152 yards and one touchdown.
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Ash has shown steady growth since splitting time with Case McCoy as a true freshman in 2011 before claiming the job last season. Expected to participate in spring practice, Ash would certainly enter as the clear starter ahead of Tyrone Swoopes, a talented dual-threat option regarded as the next Vince Young.
But Ash's concussion history will also force UT to accelerate the development of Swoopes, who has appeared in four games as a true freshman this season but is still incredibly raw as a passer, knowing that any blow to the head could sideline Ash indefinitely.