On a third and 6, Mailk Jefferson tracked down Patrick Mahomes II and pushed him out of bounds.
Texas Tech was forced to punt the ball to Texas with 1:54 left in the half.
And when Trent Domingue kicked a 29-yard field goal, the game was over.
Texas Tech was down at the half, 24-23.
Two quarters later, the Red Raiders dropped their third straight game at Jones AT&T Stadium, falling to the visiting Longhorns 45-37 on Saturday.
Since Kliff Kingsbury took over four years ago, the Red Raider are 1-21 when trailing at the half.