LSU has surged to No. 6 in The Associated Press college football poll after its second victory of September against a highly ranked team, and Wisconsin has tumbled to 18 after becoming the first top-10 team to be upset by an unranked team.
Top-ranked Alabama strengthened its hold on No. 1 on Sunday, receiving a season-high 58 first-place votes from the media panel.
LSU has now gone from No. 25 to start the season to No. 6 in three weeks.
Auburn slipped from No. 7 to No. 9. Wisconsin's loss to BYU was Saturday's most surprising result. The Badgers were three-touchdown favorites but missed a last-second field goal to tie and lost 24-21 in Madison.
BYU's reward was being ranked No. 25.
The Big Ten drew a lot of attention for having a rough Saturday, with half the league losing nonconference games. The Pac-12, more specifically the Pac-12 South, also had a rough one -- though much of the damage was done after a lot of East of the Mississippi bedtimes.
Southern California fell out of the ranking after its second straight loss, a thumping at Texas. The Trojans have now been outscored 54-17 the last two weeks. Arizona State also fell from the ranking when it could not back up its nice home win against Michigan State, losing at San Diego State.
Within the conference, Utah was beaten at home by Pac-12 North power No. 10 Washington, thwarting the Utes' chances of being ranked. UCLA dropped to 0-3 under Chip Kelly and Arizona finally managed to get coach Kevin Sumlin a victory -- by beating Southern Utah of the FCS.
Colorado is the lone unbeaten Pac-12 South team. Looks bleak, but just two seasons ago the landscape was similar for the division. After opening-week losses by USC and UCLA to start 2016, the Pac-12 South had no ranked teams. Ultimately, Colorado, the eventual Pac-12 South champ, and Utah moved into the ranking and finished in the Top 25. USC made a late-season surge behind Sam Darnold, too.
The other big mover in the right direction this week was Oklahoma State. The Cowboys jumped nine spots to No. 15 after an impressive 44-21 victory against Boise State, which tumbled out of the rankings after being No. 17.
Oklahoma State began the season unranked after being ranked at the end of the last three seasons.
Three teams moved into the ranking for the first time this season, with Boston College making its return to the Top 25 for the first time since 2008.
The Eagles beat Wake Forest on Thursday night to improve to 3-0 behind a dynamic offense led by running back AJ Dillon and blossoming quarterback Anthony Brown. BC has not won more than seven games since 2009. The 2008 team won nine and the ACC Atlantic Division but was last ranked on Nov. 30 of that year.
No. 22 Texas A&M is ranked for the first time since November 2016.
No. 25 BYU is ranked for the first time since September 2015.