Iowa State pulled off one of the biggest upsets in school history Saturday as the Cyclones won at No. 3 Oklahoma, 38-31.

Oklahoma wasted no time marching down the field. The Sooners scored on their first possession in just 2:25. The 5-play, 81-yard drive was capped off by a 23-yard Baker Mayfield pass to Trey Sermon. 7-0, Oklahoma

The Sooners took a 14-0 lead with 5:49 to go in the first quarter after an 11-play, 72-yard drive. Mayfield found CeeDee Lamb for a 15-yard touchdown. 14-0, Oklahoma

Iowa State responded with an 11-play, 67-yard drive that was capped by a Garrett Owens 25-yard field goal. Joel Lanning saw five snaps at quarterback on this drive in addition to playing linebacker. 14-3, Oklahoma

The Sooners matched Iowa State’s field goal with one of their own. Austin Seibert nailed a 25-yarder on the last play of an 11-play, 69-yard drive. 17-3, Oklahoma

Iowa State didn’t go away without a fight, however. The Cyclones marched down the field on a 10-play, 75-yard drive that ended with a David Montgomery touchdown rush. 17-10, Oklahoma

Mayfield led Oklahoma down the field on the next possession. He finished the drive with a 13-yard touchdown run. 24-10, Oklahoma

Right before halftime, Kyle Kempt connected on a 56-yard pass to Hakeem Butler. With four seconds left, Garrett Owens made a 32-yard field goal to bring the score to 24-13, Oklahoma at halftime.

Iowa State started the second half with an 11-play, 50-yard drive. The Cyclones couldn’t reach the endzone, but Garrett Owens crushed a 42-yard field goal to get the Cyclones on the board in the second half. 24-16, Oklahoma

The Cyclones tied the game after a 28-yard Marchie Murdock touchdown and a successful two-point conversion to cap a 94-yard drive. 24-24, tie game

Iowa State capped off its 21-straight points with a 57-yard touchdown from Trever Ryen on a screen pass. 31-24, Iowa State

Oklahoma tied the game on a goal line rush with just over seven minutes remaining. 31-31, tie game

The game-winning score came on back shoulder touchdown catch by Allen Lazard. Kempt fired a pass from 25 yards out and Lazard grabbed the pass over two defenders in the endzone. 38-31, Iowa State – FINAL.