Big 12 Week 9 power rankings: Iowa State surges to the top

Cyclones' opportunistic defense sparks upset (0:48)

Iowa State's Brian Peavy takes advantage of an overthrow at the goal line for a pivotal pick in a 14-7 win over previously unbeaten TCU. (0:48)

Our Big 12 Week 9 power rankings (previous ranking in parentheses):

1. Iowa State (4): The Cyclones move to the top after becoming the first FBS team in six years to defeat a pair of top-five teams in one month. Before this season, Iowa State was 1-56-2 against top-five teams. The Cyclones now own tiebreakers over OU and TCU, and could all but lock up a trip to Arlington, Texas, with a victory over Oklahoma State in two weeks.

2. Oklahoma (2): The Sooners are probably going to be displeased with the first College Football Playoff rankings, especially if Ohio State, a team they obliterated in Week 2, is ahead of them. Oklahoma, however, can bolster its own playoff resume with a win in Stillwater against Oklahoma State.

3. TCU (1): After being one of the most improved players in college football through the first half of the season, QB Kenny Hill took a step back in Ames with a couple of back-breaking turnovers. Can he bounce back? He'll have to with Texas and Oklahoma up next.

4. Oklahoma State (3): According to ESPN's efficiency metrics, Oklahoma State has the worst Power 5 special teams unit in 12 years. The good news is that the offense is No. 2 and the defense is No. 16, the latter of which is why the Cowboys prevailed in Austin and Morgantown, setting up another monster Bedlam.

5. West Virginia (5): The Will Grier-David Sills V aerial show finally fell flat in the rain against the Cowboys. West Virginia is now probably out of the Big 12 title picture, but the Mountaineers can still have a very solid season.

6. Texas (6): The Texas defense continued to smother the opposition, this time at the expense of Baylor. The Longhorns will have the opportunity to close strongly, with three winnable games following the trip to Fort Worth this weekend.

7. Kansas State (7): The Wildcats had to turn to third-string QB Skylar Thompson after Alex Delton was knocked out of the Sunflower Showdown. Up next is a game at Texas Tech, which could decide which of the two goes to a bowl.

8. Texas Tech (8): After a strong start, Tech has now dropped three in a row, all by double digits. The Red Raiders now need to make sure they get to a bowl game.

9. Baylor (9): After getting routed at home by Texas, Baylor remains the only Power 5 program without a win. If that win is going to come, it's probably going to come this weekend at Kansas.

10. Kansas (10): After getting blown out in every Big 12 game, the Jayhawks finally hung tough against K-State. If Kansas is going to get a Big 12 win, it's probably going to come this weekend against Baylor.