Since opening the season ranked No. 9 in the Associated Press' Top 25 poll, Michigan had dropped for three consecutive weeks following unimpressive victories over Fresno State and Arkansas State, and a 31-12 loss to Texas.

A 27-24 upset win over Southern Cal on Saturday helped the Wolverines climb six spots in this week’s AP poll, up to No. 12. It was the single-biggest jump of the week in college football, breathing new life into Michigan’s playoff hopes.

The new AP Top 25 college football poll is out. In Week 4, more teams fell from the ranks of the undefeated. Most notably, the No. 11 USC Trojans lost to the Michigan Wolverines in their Big Ten opener and the No.