Oklahoma dropped out of The Associated Press college football poll for the first time since September 2016 and No. 24 Iowa State jumped back into the Top 25 after a day of upsets.
There largely was stability at the top of the rankings Sunday after No. 1 Clemson, No. 2 Alabama, No. 3 Georgia and No. 4 Florida all won big, though the Bulldogs and Gators switched spots.
Clemson received 52 first-place votes and Alabama got eight from the panel of sports writers and broadcasters.
Notre Dame was idle and held at No. 5, while No. 6 Ohio State received two first-place votes despite no Big Ten Conference games scheduled until late October.
Overall, though, five teams dropped out of the Top 25 after eight ranked teams lost Saturday, six to unranked opponents.
The Sooners were involved in one of those upsets, losing at Iowa State for the first time since 1960. Oklahoma’s first two-game, regular-season losing streak in 21 years snapped its string of 64 straight poll appearances.
The 22nd-ranked Longhorns managed to hold on to a spot in the rankings, falling 13 spots after losing at home to TCU.
Losses up and down the top 25 have provided the setting for one of the most significant shakeups in the college football rankings to date. When the new Coaches Poll top 25 was released on Sunday, four teams had fallen out of the rankings and five teams saw jumps up of five spots or more.
A total of eight ranked teams lost in Week 5, with six of those losses coming to unranked opponents. No. 13 Auburn and No. 20 Texas A&M weren't punished as much for their losses to No. 3 Georgia and No. 2 Alabama, while the falls for the other six teams dropped them right out of the rankings.
Oklahoma State was one of the biggest risers this week, up nine spots to No. 10 after beating Kansas to improve to 3-0.
The most notable drop was for Oklahoma, which now sits at 1-2 after its loss to Iowa State. The Sooners are unranked for the first time since 2014. It's also the first 0-2 start in Big 12 play for the Sooners since 1998.
While the shifts were dramatic further down the rankings, it's also notable to see the coaches start to put some more support behind Georgia, which is up one spot and now in a tie for No. 3 with its SEC East rival Florida.