The Sooners (12-0) collected all 63 first-place votes and 1,575 points following their 56-25 drubbing of Texas Tech. The Trojans (10-1), who blasted UCLA, 47-22, got 1,510 points, meaning two voters placed them third or one put them fourth.
Michigan is now fourth after beating Ohio State, 35-21, to end the Buckeyes' hopes to defend their national championship. Georgia and Texas are fifth and sixth, with OSU, Tennessee, Florida State and Miami (Fla.) in spots 7-10.
Florida is 11th, with Iowa, Purdue, Washington State, Kansas State, Miami of Ohio, TCU, Boise State, Mississippi, and Virginia Tech in spots 12-20.
TCU lost its first game on Thursday night to Southern Mississippi.
Rounding out the top 25 are Pittsburgh, Minnesota, Nebraska, Oklahoma State, and Bowling Green.
For the first time this season, no team dropped out.