Joe Bergeron ran for 102 yards and a touchdown for the Longhorns (8-3, 7-1 Big 12), who end their regular season on Dec. 7 at No. 9 Baylor. If Texas wins that game and No. 7 Oklahoma State loses to No. 20 Oklahoma, the Longhorns would win their first league championship since 2009.
Texas Tech (7-5, 4-5) ended its regular season with its fifth consecutive loss under first-year coach Kliff Kingsbury.
The Red Raiders came in with the nation's top passing offense, but Texas sacked freshman quarterback Baker Mayfield seven times. Texas Tech's biggest play came on a 51-yard touchdown on a fake punt by Ryan Erxleben in the first quarter.
Mike Davis caught touchdowns of 47 and 7 yards for Texas.