How the college football national championship changed through the decades
Each season, 136 teams have the opportunity to complete the perfect season. Six weeks into the 2025 season, only 15 teams can still chase this dream. After Week 6 of 2024, 12 teams remained perfect. Oregon was the last team remaining last season, not losing until the CFP quarterfinals.
Michigan was the last team to complete the perfect season, going 15-0 in 2023 and capturing the national championship.
POLLS: Check out the latest top 25 rankings
Here are the 15 undefeated FBS teams through Week 6:
*Teams are listed alphabetically, times are all Eastern. Rankings are from the AP Top 25 Poll
No. 18 BYU (5-0)
- Previous: def. West Virginia, 38-24
- Up next: vs. Arizona, 8 p.m. on Saturday, Oct. 11
- Last undefeated season: 1984 | 13-0 | Won national championship
No. 13 Georgia Tech (5-0)
- Previous: def. Wake Forest, 30-29 (OT)
- Up next: vs. Virginia Tech, 3:30 p.m. on Saturday, Oct. 11
- Last undefeated season: 1990 | 11-0-1 | Won national championship (coaches' poll)
No. 7 Indiana (5-0)
- Previous: def. Iowa, 20-15
- Up next: at No. 3 Oregon, 3:30 p.m. on Saturday, Oct. 11
- Last undefeated season: 1945 | 9-0-1 | Won Big Ten Championship
🏆 PERFECTION: Every undefeated national champion since 1936
No. 23 Memphis (6-0)
- Previous: def. Tulsa, 45-7
- Up next: at UAB, TBD on Saturday, Oct. 18
- Last undefeated season: 1963 | 9-0-1
No. 2 Miami (Fla.) (5-0)
- Previous: def. Florida St., 28-22
- Up next: vs. Louisville, 7 p.m., Saturday, Oct. 18
- Last undefeated season: 2001 | 12-0 | Won national championship
No. 14 Missouri (5-0)
- Previous: def. UMass, 42-6
- Up next: vs. No. 8 Alabama, 12 p.m. on Saturday, Oct. 11
- Last undefeated season: 1909 | 7-0-1
Navy (5-0)
- Previous: def. Air Force, 34-31
- Up next: at Temple, 4 p.m. on Saturday, Oct. 11
- Last undefeated season: 1926 | 9-0-1
North Texas (5-0)
- Previous: def. South Alabama, 36-22
- Up next: vs. South Florida, 7:30 p.m. on Friday, Oct. 10
- Last undefeated season: Never
No. 1 Ohio State (5-0)
- Previous: def. Minnesota, 42-3
- Up next: at No. 17 Illinois, 12 p.m., Saturday, Oct. 11
- Last undefeated season: 2012 | 12-0 | Ineligible for postseason
No. 4 Ole Miss (5-0)
- Previous: def. No. 4 LSU, 24-19
- Up next: vs. Washington State, 12:45 p.m. on Saturday, Oct. 11
- Last undefeated season: 1962 | 10-0 | Won Sugar Bowl
No. 6 Oklahoma (5-0)
- Previous: def. Kent State, 44-0
- Up next: vs. Texas, 3:30 p.m. on Saturday, Oct. 11
- Last undefeated season: 2000 | 13-0 | Won national championship
No. 3 Oregon (5-0)
- Previous: def. No. 3 Penn State, 30-24 (2OT)
- Up next: vs. No. 7 Indiana, 3:30 p.m. on Saturday, Oct. 11
- Last undefeated season: 1916 | 7-0-1 | Won Rose Bowl
No. 5 Texas A&M (5-0)
- Previous: def. Mississippi State, 31-9
- Up next: vs. Florida, 7 p.m., Saturday, Oct. 11
- Last undefeated season: 1994 | 10-0-1 | Ineligible for postseason
No. 9 Texas Tech (5-0)
- Previous: def. Houston, 35-11
- Up next: vs. Kansas, 7:30 p.m., Saturday, Oct. 11
- Last undefeated season: Never
UNLV (5-0)
- Previous: def. Wyoming, 31-17
- Up next: vs. Air Force, 3:30 p.m., Saturday, Oct. 11
- Last undefeated season: Never
LOOKING BACK: History of college football during World War II
