A week ago, six of the top 16 teams in the College Football Playoff rankings lost, shuffling conference title races and adding more teams to the bubble for the at-large bids. Week 14 is Rivalry Week and has spots in every major conference title game up for grabs.

The latter half of the projected College Football Playoff bracket experienced a major shakeup after the chaos of Week 13. Three teams featured in the previous bracket cycled out of the field after getting upset to bring in a new round of contenders.

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.

The College Football Playoff has used a selection committee since its first season in 2014, and that hasn’t changed. A 13-member committee, which has announced its rankings weekly since November, will set the bracket when it unveils the final 12-team rankings on Dec. 8.

The fourth edition of the College Football Playoff Rankings were released Tuesday night with undefeated Oregon maintaining its spot at No. 1 as has been the case in every set of rankings during this initial year of the expanded 12-team field.