LUBBOCK, Texas (AP) — Freshman backup quarterback Davis Webb threw a 19-yard touchdown pass to Bradley Marquez with 3:48 remaining to lead Texas Tech to a 20-10 victory over No. 24 TCU on Thursday night.

The score came after the Red Raiders (3-0, 1-0 Big 12) thought they’d scored on a 49-yard TD pass from Webb to DeAndre Washington, but he dropped the ball at the half-yard line.

An unsportsmanlike conduct penalty took them back to the TCU 14. Two plays later, Webb hit Marquez.

TCU (1-2, 0-1) scored its only touchdown when B. J. Catalon ran in from 17 yards to make it 10-all with 6:28 remaining

TCU’s Trevone Boykin went 23 for 36 for 194 yards and two interceptions.

Baker Mayfield, Texas Tech’s starting quarterback, left the game in the fourth quarter with what appeared to be a leg injury. He went 21 of 40 for one touchdown and 216 yards. He threw three interceptions.

Webb went 3 for 4 for 77 yards and a touchdown.