College Football Power Rankings: How did the top 25 look in Week 13?

What happened in Week 13? We are now down to one undefeated FBS team following No. 5 Indiana's loss to No. 2 Ohio State and No. 19 Army's loss to No. 6 Notre Dame. On top of that, four ranked teams fell to their unranked opponents on Saturday.

With No. 16 Colorado's loss to Kansas and No. 14 BYU falling to No. 21 Arizona State, the Big 12 has a four-way tie at the top of the standings. What does each team have to do next week to reach the conference title game?

After their defense dominated the Hoosiers at Ohio Stadium, the Buckeyes have one more conference matchup left. What do they need to do to meet Oregon in the Big Ten title game?

How did Saturday's action affect our Power Rankings?

Here's the latest top 25 from our college football experts, who provide their insight on each team following Week 13.

Previous ranking: 1