Northwestern moved up eight spots after beating Wisconsin 17-7 to improve to 5-0. The Badgers slipped eight spots to 18th.
The Wildcats were last ranked this highly in 1996. The year after their surprising run to the Rose Bowl, coach Gary Barnett’s team reached a high of No. 10.
No. 12 Indiana dropped three spots after putting a scare into Ohio State in the Big Ten’s other top-25 matchup Saturday. The Buckeyes beat the Hoosiers 42-35 after leading 35-7.
This is the 80th time in the history of the AP poll, which dates back to 1936, there has been a unanimous No. 1.
It was a rare occurrence in the early days of the poll, when college football was more regional. From 1936-66, only twice was there a unanimous No. 1.
Southern California was a unanimous No. 1 twice during the 1967 season, but not until the 1990s did the unanimous No. 1 become a common occurrence.
From 1992, when Alabama finished the season by getting all the first-place votes in the poll, to last season when LSU did the same, the AP Top 25 had a unanimous No. 1 on 67 occasions.
The unanimous No. 1 for Alabama is its 22nd overall, most of any school, and its 21st since 2012.
No. 1 Alabama faces No. 22 Auburn next in the 24th Iron Bowl that will match ranked teams.
Four ranked teams lost Saturday, but three of those defeats came against other ranked teams. Because of that, just one team fell out of the rankings.
Liberty took its first loss of the season, falling 15-14 at North Carolina State, and is no longer ranked.
Replacing the Flames was North Carolina, which moved back into the rankings at No. 25.
SEC — 5 (Nos. 1, 5, 6, 13, 22).
ACC — 4 (Nos. 2, 4, 10, 25).
Big Ten — 4 (Nos. 3, 11, 12, 18).
Big 12 — 4 (Nos. 14, 15, 20, 21).
American — 2 (Nos. 7, 24).
Pac-12 — 2 (Nos. 9, 19).
Sun Belt — 2 (Nos. 16, 23).
C-USA — 1 (No. 17).
Independents — 1 (No. 8).