After a wild Week 6 in college football, there are only 13 teams remaining with an undefeated record.

Penn State and Alabama were amongst the undefeated teams to suffer losses on Saturday. Meanwhile, programs like Iowa, Oklahoma and Georgia defeated ranked teams to keep their undefeated records intact.

There are three remaining undefeated teams in the Big Ten, which is the most of any conference: Iowa, Michigan and Michigan State. The Big 12 and ACC each have two remaining unbeaten teams. The ACC has one and the Pac-12 has zero.

Here’s the full list, courtesy of the Action Network’s Brett McMurphy:

Iowa’s path to an undefeated regular season is relatively straight forward. The Hawkeyes don’t have another ranked team on their schedule and will be heavily favored in their remaining contests.

It’s a much different story for Michigan and Michigan State. Those programs still have to play each other, Ohio State and Penn State before the end of the regular season.