College football rankings: Compiling the Top 25s

Rivalry Week has come and passed, with the usual shenanigans taking place. Seven ranked teams fell this week, including five by the hand of other ranked opponents.

How far will Mississippi State fall after their two touchdown Egg Bowl loss to Ole Miss? Will TCU replace them in the top four, or will Baylor or Ohio State make a run at it? Where does UCLA end up after their loss to Stanford? How high will Arizona rise after their win over Arizona State, before their matchup with Oregon? What about Georgia Tech, upset winners over Georgia, before their game against Florida State?

We have some answers for you now, with the AP Poll, Coaches Poll and computer composite rankings via Massey. The official Playoff rankings come out Tuesday but we'll try to hold you over until then with these.

The four rankings we use:

The Associated Press Top 25: The longest-running and best-respected human poll. Didn't have any official bearing on the latter years of the BCS, and won't have any official bearing on the Playoff. Expect it to set the course for the committee, however, as most outlets (including SB Nation) will use the AP's rankings as the standard until the committee takes over in late October. Usually comes out Sundays around 2 p.m. ET.

The USA Today Coaches Poll: Formerly part of the BCS, and now just a poll. It tends to be more conservative than the AP's. Though polling athletic departments in order to rank other athletic departments is dubious, we still want multiple human polls in here, and it's the other big one. Releases early Sunday afternoons.

The Massey computer composite: A collection of ... every rating out there. By including it here, we're giving extra weight to the two human polls, since they're already two of the dozens of ratings included in the Massey. It changes over the course of the week as more rankings arrive, so we've included the latest version as of publication.

Football Outsiders' F/+ rating: A synthesis of ratings by smart persons Bill Connelly and Brian Fremeau and our personal go-to overall team stat. It tends to come out later than the others.

Last week's composite Top 25: