Photo: Brett Deering/Getty

Baker Mayfield and the third-ranked Oklahoma Sooners were upset this afternoon by unranked Iowa State, a 31-point underdog, after the Cyclones outscored the Sooners 25-7 in the second half.

Oklahoma appeared to have this one in hand after jumping out to a 17-3 lead behind a pair of Mayfield touchdown passes. Iowa State responded with a 75-yard touchdown drive in the second quarter and a field goal late in the first half, but still trailed at halftime 24-13.

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The second half was all Iowa State—the Cyclones scored points on three consecutive possessions, including two touchdowns, to surge back and take a 31-24 lead with 12:46 left in the fourth quarter. Oklahoma came back with a 10-play touchdown drive in which they faced just two third downs, but with the score tied with 2:19 left on the clock, the Cyclones struck from 25 yards out for the winning score:

Oklahoma turned it over on down on their subsequent drive, and that was that.