The senior quarterback entered the game in the fourth quarter and threw two touchdown passes including the go-ahead score to Cam Batson with under two minutes remaining in the Red Raiders 27-23 win in Austin.
The win made the Red Raiders (6-6) eligible for a bowl game and likely saved the job of coach Kliff Kingsbury.
The Red Raiders would go ahead 10-7 early in the second quarter on a Clayton Hatfield 32-yard field goal.
Texas rerook the lead on its ensuing possession with a 9-yard scoring run by Daniel Young.
Texas Tech wideout T.J.
That allowed the Longhorns to hold on to a 20-13 lead. Six snaps later, the Longhorns hadn't punched it in and took a 20-yard field goal by Joshua Rowland.
Near the end of the first half, a 44-yard interception return by Davante Davis put Texas in business at the Tech 19.
Texas had the ball in Texas Tech territory late in the 4th quarter with the opportunity to run out the clock, but San Ehlinger threw his first interception of the game interception and it was returned inside the Texas 15.
Nic Shimonek entered the game in the 4th and threw a touchdown pass to T.J. Vasher to cut the Longhorns lead to 23-20 and then the Game victor to Batson. The Red Raiders scored 2 plays later on a 13 yard pass from Shimonek to Cameron Batson that was ultimately the game victor.
The Red Raiders rose up over and over, forcing nine punts, but Longhorns punter Michael Dickson averaged 50.9 yards.