There was some significant movement in the new rankings released after the Week 13 games. While the top four teams in last week's rankings —Oregon, Ohio State, Texas, and Penn State—all took care of business, other teams projected to be in the 12-team College Football Playoff bracket suffered losses.

The College Football Playoff will soon release its fourth top 25 rankings of the season. Here’s what you need to know and how to watch.

W ith just one week left in the college football regular season, the only thing we really know about the playoff field is that we don't know anything for sure about anything yet.