Oklahoma State ends Oregon's unranked winning streak with 39-31 upset in Stillwater

College football's early-season ranking order absorbed its sharpest revision yet on Saturday. Oklahoma State defeated preseason No. 2 Oregon 39-31 in Stillwater, ending the Ducks' 41-game winning streak against unranked opponents and giving first-year Cowboys head coach Eric Morris his first win at the program. The result stands as the first major upset of the season.

The Cowboys arrived carrying a recent institutional record of losing. Oklahoma State went 1-11 last season and entered the current year with a 24-10 defeat to Tulsa already on the ledger. Against that backdrop, Saturday's win sparked a memorable celebration in Stillwater, a signal of what the result meant to a program still finding its footing under Morris.

Quarterback Drew Mestemaker was the decisive factor. He finished with 317 passing yards and two touchdowns through the air, while also running for 109 yards and a score. A 10-yard touchdown run early in the fourth quarter gave Oklahoma State the lead it would not relinquish. The performance was a clear rebound from a difficult opener for Mestemaker, and his connection with Morris ran back a season: he played under the coach at North Texas before Morris took the Cowboys job.

Oregon's standing in the early-season cycle

Oregon's vulnerabilities had surfaced before Saturday. The Ducks were the preseason No. 2 nationally and had looked exposed in a season-opening home win over Boise State, a result that raised questions even before the Cowboys arrived. The 39-31 defeat now makes the Ducks' path through the national championship conversation considerably narrower, and it closed out the 41-game winning streak against unranked opponents that had become a measure of Oregon's sustained dominance at that level.

The Cowboys' win also snapped a 21-game losing streak against FBS opponents. That figure frames the scale of what Morris accomplished in a single afternoon and explains the mood in Stillwater. On balance, one early-season loss does not remove a program of Oregon's standing from the national title conversation entirely. The Ducks had entered Saturday as overwhelming favorites.