Oklahoma, where the No. 1 ranking rests again.

The Sooners sit atop the AP Top 25 on Sunday after the first upset-filled weekend of the season gave the media poll a powerful shake. Alabama was both a mover and a shaker, as the Crimson Tide rose to No. 2 after a surprising 41-30 pounding of Georgia.

Previously top-ranked Southern California lost at Oregon State to set the tone for a weekend that brought back memories of the topsy-turvy 2007 season.

On Saturday, two more top-five teams fell. Florida was stunned at home by Mississippi, 31-30. Georgia, which started the season No. 1, was down 31 points by halftime to Alabama and never recovered.

Overall, nine ranked teams lost, six to unranked foes.

The last time such a shake-up occurred? One year ago, when in the last week of September three of the top-five teams fell and seven ranked teams lost to unranked opponents.

Read the rest of the AP story recapping a roller-coaster weekend in college football.

Florida fell to No. 12. Ouch.