2014 college football rankings, Week 6: The composite Top 25

Week 5 is in the books, with just two ranked teams losing -- one to a ranked opponent (Arizona State lost to UCLA) and one to an unranked opponent (South Carolina fell to Missouri). The rest of the top 25 survived, but it wasn’t necessarily easy. Florida State struggled against unranked NC State, Texas A&M made a frantic comeback to beat Arkansas in overtime, Georgia survived a Tennessee upset bid, and Stanford beat Washington by just a touchdown.

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 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.

Jeff Sagarin’s Sagarin Rating: An early-morning insta-ranking that combines three of Sagarin’s computer formulas into one. This is not the formula the BCS used, which excluded margin of victory.

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.