More than one-fifth of last week’s Coaches Poll top 25 teams took an L during this past weekend’s college football action, ensuring that we’ll see some prominent changes in the updated rankings as we look ahead to the Week 5 games as the coaches fill out their ballots.

There are highs and lows every week in college football. The winners and losers for Week 4 start with Southern California's loss to Michigan.

The Wolverines grinded out a win over the Trojans, plus the rest of the weekend’s most notable winners and losers.