Michigan dropped out of the Top 25 for the first time in two years, while Notre Dame jumped into the top 10 for the first time this season in the Associated Press college football poll released Sunday.
No major upsets shook up college football this weekend, as the top eight teams remain unchanged from last week.
Alabama, which beat Tennessee 45-7, remains a unanimous No. 1 in this week's media poll. This is the 98th time Alabama is ranked No. 1, tying Notre Dame at No. 3 on the all-time list.
The Crimson Tide are idle this week, then face No. 23 LSU on Nov. 4.
Penn State, which defeated Michigan 42-13, is No. 2. Michigan, which was 19th last week, is out of the Top 25 for the first time since Sept. 20, 2015.
Georgia is No. 3 followed by No. 4 TCU and No. 5 Wisconsin. Ohio State, which had a bye, is the highest-ranked one-loss team at No. 6 and hosts Penn State on Saturday.
Notre Dame rose four spots to No. 9 after beating USC 49-14. The Trojans slipped to No. 21.
The Irish were 10th to start 2016, but they finished 4-8 last year. Notre Dame was unranked in this year's preseason poll.
Iowa State moved into the rankings at No. 25. The Cyclones (5-2) are ranked for the first time since September 2005.