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.

Oregon, Ohio State, Texas and Penn State held onto the top spots in the latest edition of the College Football Playoff rankings, the selection committee announced. Three other schools dropped from the projected list.

Boise State is on pace to beat the Big 12 champion for a first-round bye in the College Football Playoff, and with Tulane on the rise, could the Green Wave push the conference entirely out of the 12-team playoff?