Texas is back at No. 1 in the Associated Press college football Top 25, and Ohio State returned to No. 2 after a weekend of upsets caused a major upset that dropped previously top-ranked Alabama to seventh.

The Crimson Tide was one of five teams in the top 11 to lose on Saturday. Alabama’s loss to Vanderbilt was the centerpiece as the Tide lost to the Commodores for the first time in 40 years in just the second loss of a No. 1 team to an unranked team in college football in the past 16 seasons.

Texas, which escaped the chaos that fell on the SEC by staying away, received 52 first-place votes and moved back to No. 1 after being pushed to No. 2 last week when the Crimson Tide defeated Georgia. No. No. 2 Ohio State received nine first-place votes and is followed by Big Ten rivals Oregon at No. 3 and Penn State at No. 4. The Buckeyes and Ducks meet next Saturday night in a top-three matchup in Eugene.

Georgia kept its spot at No. 5 and Miami, which narrowly escaped as the fifth high-ranked team to lose to an unranked team when it rallied from 25 points down to beat Cal, moved up two spots to No. 6 .

Behind Alabama is No. 8 Tennessee, the other top-five SEC team to be upset on the road on Saturday. The Vols fell to Arkansas 19-14. No. 9 Ole Miss and Clemson round out the top 10.

No. No. 22 Pitt and No. 25 SMU advanced to the rankings for the first time this season, and previous No. 11 USC, No. 22 Louisville and No. 25 UNLV dropped out (26 teams were ranked last week due to a tie).

Others receiving votes: USC 98, Nebraska 51, Navy 43, Army 33, Vanderbilt 26, Arkansas 17, Washington State 8, Iowa 8, Texas Tech 7, Syracuse 6, Washington 4, Louisville 4, Colorado 3, Kentucky 1

More change at number 1

Turnovers at No. 1 haven’t been in college football for a while. The last time three different teams were ranked No. 1 in Week 6 was in 2008, when Georgia was the top team in the preseason before immediately being passed to USC — despite the Bulldogs winning their opener — and then Oklahoma taking the top spot after the Trojans. were upset by unranked Oregon State and Jacquizz Rodgers in a famous Thursday night game in Corvallis.

Overall, No. 1 has already changed hands three times between three teams this season. The last time the No. 1 ranking changed hands as many as three times during the first six weeks of the season was 1984, when it went from preseason No. 1 Auburn to Miami, Nebraska and Texas in Week 5, according to College Poll Archive. – Russo

How setbacks changed the Top 25

Normally, there’s a Saturday sometime in early October when the results cause AP Poll voters to hit the reset button and really start to abandon all preseason beliefs. This was one of those weekends.

One of the most notable moves was Clemson, which not only bounced back from an opening loss to Georgia but also cracked the top 10 at No. 10 for the first time this season.

No. 11 Iowa State also rose five spots to its season-high rankings. No. 18 Indiana did the same. There is a three-way tie at 18 between the Hoosiers, Kansas State and Oklahoma.

No. No. 15 Texas A&M rode its blowout of Missouri to a 10-spot jump, while the Tigers moved 12 spots to No. 21 and Michigan’s second loss of the season sent the Wolverines tumbling 14 spots to No. 24. – Russo

How wild was week 6?

• Seven of the 18 ranked teams that played lost, starting with UNLV falling to Syracuse late in overtime Friday night.
• Six ranked teams lost to unranked opponents.
• Saturday marked the first day that four of the top 11 teams lost to unranked opponents since five did so on November 12, 2016.
• Saturday marked the first day two of the top four teams lost to unranked opponents since three did so on Nov. 12, 2016.
• Vanderbilt’s win against Alabama was the first against an AP top-five team in 61 tries.
• Arkansas’ win against Tennessee was its first against an AP top-five team since 2007 against No. 1 LSU, which still won the BCS title.
• Texas A&M’s 41-10 win against No. 9 Missouri was its largest against a top 10 opponent, surpassing its 52-28 victory over No. 9 South Carolina in 2014.

And the week was almost even more chaotic, as Miami needed a big comeback to beat Cal. – Brown

GO DEEPER

Where Vandy over Alabama is one of the #1 upsets of all time

How Matt voted

This was one of the most difficult ballots I have completed in eight seasons as a voter. The top three was easy with Texas, Ohio State and Oregon. Then…

How far should Alabama fall? There is no right answer. Alabama may have the best winning streak among the top teams, beating Georgia last week. Alabama also has one of the most stunning losses, to Vanderbilt. Since the Bulldogs and Crimson Tide had identical records, I stayed true to the head-to-head and kept Alabama ahead of Georgia (and Georgia ahead of Clemson). Alabama only getting No. 6 on my ballot doesn’t feel like a punishment enough, but I had a hard time getting anyone else over the Tide.

I have Boise State in my top 10. Why not? The Broncos’ only loss was by three to No. 3 Oregon. They have a leading Heisman Trophy candidate in Ashton Jeanty, who has already rushed for 1,000 yards, and they also have a dominant win against 4-1 Washington State. They are as deserving as anyone in a race for wide-open spots, with little separation between the back of the top 10 and the back of the poll.

Texas A&M is my biggest climber. I dropped the Aggies from the rankings, but jumped them to No. 14 – one spot behind Notre Dame – after their dominant win against Missouri. Their win against Arkansas also looks better after the Razorbacks upset Tennessee.

Tennessee remains on my ballot; Michigan, USC and Missouri are eliminated. I dropped the Vols from No. 3 to No. 15 after their close loss to Arkansas. They still own the win against Oklahoma, but the credit for blowing out what turned out to be a bad NC State team is diminishing. I saw no reason to keep Missouri in the rankings even though I had No. 9, as the Tigers defeated Boston College and Vandy by a combined nine points before losing to Texas A&M by 31 points. And Michigan and USC, who played a dramatic game a few weeks ago, both had two losses.

The only two-loss team I ranked? Vanderbilt. Hey, with so much churn, give the Commodores credit for knocking out #1. I have them 22nd.

Welcome to my ballot, Army (24) and Navy (23). The Black Knights and Midshipmen are a combined 10-0 – and they’re winning in dominant fashion. – Brown

Will the chaos continue?

There are 2007 vibes coming from the start of this season.

That ’07 season set the modern standard for sameness and strangeness in college football. More recently, superteams have dominated the top of the rankings, rarely losing to anyone other than other highly ranked teams.

There have already been eight instances this season of top-10 teams losing to unranked teams. As ESPN’s Bill Connelly noted on social media Sunday morning, nine top-10 teams lost to unranked teams through six weeks of the 2007 season. That season, four teams were ranked No. 1: USC, LSU, Ohio State and Missouri (for one week) and it changed hands six times. LSU became the only national champion with two losses. With the expanded Playoff and bigger-than-ever power conferences, we may be headed there again.

What this season probably won’t match 2007 is the variety of first-place teams. Here are some of the teams that reached No. 2 that season: California, South Florida, Boston College, Oregon, Kansas and West Virginia.

In this age of super conferences, it seems unlikely we’ll get something like this – but keep an eye on Indiana and Boise State. – Russo

What’s next in week 7?

The Big Ten takes center stage in prime time, with No. 2 Ohio State visiting No. 3 Oregon in the biggest game of the season so far for both. The winner will argue for No. 1, although Texas has a spotlight rivalry matchup against No. 18 Oklahoma to try to hold onto that spot ahead of a visit from Georgia on Oct. 19.

After USC fell out of the poll following its loss to Minnesota, its season could be on the line with a visit from No. 4 Penn State. There is also an SEC matchup with No. 9 Ole Miss visiting No. 13 LSU.

Required reading

(Photo: Carly Mackler/Getty Images)