The Sooners rallied from behind in the Red River Rivalry after Manning threw two interceptions in the fourth quarter.
Texas came into the Cotton Bowl at 4-0 and ranked No. 1, fresh off a bye week following a tight road win at Tennessee. Oklahoma arrived desperate at 2-2 and 0-1 in SEC play, needing a win to keep any realistic hope of a College Playoff return alive. By the final seconds, it was the Sooners celebrating a come-from-behind victory.
Arch Manning threw two interceptions in the fourth quarter, and Oklahoma capitalized to complete the comeback. Texas had built its season on escaping its own flaws, and in Dallas those flaws finally caught up with the Longhorns, from special teams breakdowns to late-game mistakes at quarterback.
Oklahoma's offense had struggled coming in, ranked last in the SEC in yards per game and without a touchdown in three of its previous four losses to Texas. None of that mattered once Manning's turnovers gave the Sooners their openings in the fourth quarter.
Texas now drops out of the No. 1 spot and faces five straight ranked opponents with real questions about its offense. Oklahoma, meanwhile, walks away with one of the bigger upsets of the season and a measure of life back in its own campaign.