Unranked Oklahoma knocks off No. 1 Texas in walk-off fashion after Arch Manning's rough 4th quarter

The top-ranked Texas Longhorns had at least a couple chances to win their third-straight Red River Rivalry, but the top-ranked team in the country faltered on its biggest stage of the college season.

Instead, the unranked Oklahoma Sooners took advantage of a missed field goal in the final minutes and two fourth-quarter interceptions by Arch Manning to pull off a wild 27-24 upset victory in Dallas.

The Red River Rivalry looked like it would be all Texas early, as Arch Manning made one of his better plays...