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Andy Wittry | | October 24, 2021

Undefeated college football teams in 2021

College football rankings: Alabama jumps Oklahoma; Penn State dips

Only nine undefeated college football teams are left at the FBS level as we play Week 8. Iowa State's 24-21 upset of No. 8 Oklahoma State and Appalachian State's 30-27 upset of No. 14 Coastal Carolina brought us to the current level. It was just Appalachian State's second win over a ranked FBS opponent in program history — the other being its memorable win over No. 5 Michigan in Ann Arbor in 2007 — and similarly, this latest win for the Mountaineers came on kicker Chandler Staton's 24-yard field goal in the closing second.

Here's a closer look at the remaining undefeated teams in the FBS this season, as of Oct. 23, 2021.

Dale Zanine | USA TODAY Sports Images Georgia has the No. 1 scoring defense in the country through Week 5.

No. 1 Georgia (7-0)

Next game: 3:30 p.m. ET, Saturday, Oct. 30 vs. Florida (CBS)

Georgia might have a historically great defense as the Bulldogs have allowed just 49 points through seven games, including back-to-back shutouts against SEC foes Vanderbilt and Arkansas. The Bulldogs rolled again in Week 7, beating previously undefeated No. 11 Kentucky 30-13.

No. 2 Cincinnati (7-0)

Next game: 12 p.m. ET, Saturday, Oct. 30 at Tulane (ESPN2)

Navy didn't make it easy, as Cincinnati escape with a 27-20 road win. The Midshipmen recovered an onside kick inside a minute to go, but Arquon Bush secured the win with an interception. It was the Bearcats' first win by a single possession this season.

RANKINGS: See all the latest FBS polls

No. 4 Oklahoma (8-0)

Next game: 3:30 p.m. ET, Saturday, Oct. 30 vs. Texas Tech (ABC)

Oklahoma has won close game after close game, most recently needing to get by Kansas 35-23. The Sooners trailed 17-7 late in the third quarter before rallying to win. In the fourth quarter, with Kansas down by 5 late, RB Kennedy Brooks was about to be stopped on fourth down. But QB Caleb Williams took the ball away from his teammate to pick up the first down to help OU win.

Jeff Hanisch | USA TODAY Sports Images Michigan is 5-0 after a road win at Wisconsin.

No. 6 Michigan (7-0)

Next game: Saturday, Oct. 30 vs. at Michigan State

The Wolverines rolled in Week 8, defeating Northwestern 33-7. Michigan outgained the Wildcats 457 to 233 and never trailed. Both Blake Corum and Hassan Haskins rushed for more than 100 yards and two touchdowns.

No. 8 Michigan State (7-0)

Next game: Saturday, Oct. 30 vs. Michigan

Michigan State improved to 4-0 in the Big Ten, with three of those wins coming on the road, as the Spartans defeated Indiana 20-15 in Week 7. They overcame a 9-7 halftime deficit to win by five points thanks to three turnovers forced against the Hoosiers.

MORE: How the first CFP rankings predict the semifinals

No. 13 Wake Forest (7-0)

Next game: 4 p.m. ET, Saturday, Oct. 30 vs. Duke (ACC Network)

The Demon Deacons won a wild one at Army, putting up 70 points in a 70-56 win. Wake Forest QB Sam Hartman finished 23-for-29 passing for 458 yards and five touchdowns without throwing an interception. The two teams combined for more than 1,200 yards of offense.

No. 19 SMU (7-0)

Next game: 7 p.m. ET, Saturday, Oct. 30 at Houston

SMU could be Cincinnati's top contender in the AAC as the two are the only undefeated teams left in the conference. The Mustangs have scored at least 31 points in every game so far. SMU got by Tulane, 55-26, in its most recent win.

No. 21 San Diego State (7-0)

Next game: 10:30 p.m. ET, Saturday, Oct. 30 vs. Fresno State (CBSSN)

The Aztecs are holding opponents just under 16 points per game. Two of San Diego State's six wins came against Pac-12 opponents — Arizona and Utah. In its most recent victory, San Diego State fought off a late rally from Air Force, winning 20-14.

No. 23 UTSA (8-0)

Next game: 4 p.m. ET, Saturday Nov. 6 at UTEP (ESPN Networks)

The Roadrunners opened their season with a road win over Illinois, and in Week 4, they defeated Memphis on the road. UTSA had another close win to get to 6-0, hanging on to beat Western Kentucky 52-46 on the road. UTSA allowed 670 yards but came up with the big interception late to get the win. UTSA then routed Rice and Louisiana Tech, 45-0 and 45-16, respectively.

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