Oregon made quite the statement heading into college football's midseason junction, holding off previously unbeaten Ohio State to move up in this week's national rankings. The victory validates the Ducks as one of the College Football Playoff national championship frontrunners and puts the Buckeyes in the unfamiliar position of needing to play flawlessly over their final six games in hopes of a rematch.

With the new, 12-team CFP field, one loss doesn't completely erase a teams' CFP hopes. Ohio State, Clemson and Georgia are the case studies.

Last week, Army and Navy each reached 5-0 in the same season for the first time since 1945. On Sunday they both landed spots in the AP Top 25 for the first time since October 1960. Both will play Notre Dame in the coming weeks,