Record*: 71-58, .550 W-L% (3rd of 12) (Schedule and Results)
*W-L-T adjusted to 67-58 by NCAA.
SRS: 5.55 (4th of 12) ▪ SOS: 3.39 (4th of 12)
Conference Champion: Iowa and Michigan
Ranked in Preseason AP Poll: 6 (Iowa, Michigan, Minnesota, Ohio State, Purdue and Wisconsin)
Ranked in Final AP Poll: 4 (Iowa, Michigan, Ohio State and Wisconsin)
| Overall | Conference | Pts/G | SRS | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| School | W | L | Pct | W | L | Pct | Own | Opp | SRS | SOS | Notes |
| Iowa | 10 | 2 | .833 | 7 | 1 | .875 | 24.3 | 17.6 | 14.39 | 5.97 | |
| Michigan | 9 | 3 | .750 | 7 | 1 | .875 | 30.8 | 23.3 | 12.24 | 4.82 | |
| Wisconsin | 9 | 3 | .750 | 6 | 2 | .750 | 20.8 | 15.4 | 8.69 | 2.35 | |
| Northwestern | 6 | 6 | .500 | 5 | 3 | .625 | 24.6 | 28.5 | 1.71 | 5.04 | |
| Ohio State | 8 | 4 | .667 | 4 | 4 | .500 | 24.2 | 18.3 | 11.31 | 5.14 | |
| Purdue | 7 | 5 | .583 | 4 | 4 | .500 | 31.8 | 17.2 | 10.93 | 4.02 | |
| Michigan State | 5 | 7 | .417 | 4 | 4 | .500 | 29.4 | 27.2 | 2.30 | 2.30 | |
| Minnesota | 7 | 5 | .583 | 3 | 5 | .375 | 30.1 | 22.8 | 5.74 | 1.49 | |
| Penn State | 4 | 7 | .364 | 2 | 6 | .250 | 17.7 | 15.3 | 3.24 | 2.24 | W-L-T adjusted to 0-7 by NCAA. |
| Illinois | 3 | 8 | .273 | 1 | 7 | .125 | 21.8 | 29.4 | -4.53 | 1.83 | |
| Indiana | 3 | 8 | .273 | 1 | 7 | .125 | 23.8 | 31.2 | -4.98 | 2.11 | |
| School | Pre | 9/5 | 9/12 | 9/19 | 9/26 | 10/3 | 10/10 | 10/17 | 10/24 | 10/31 | 11/7 | 11/14 | 11/21 | 11/28 | 12/5 | Final |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Iowa | 19 | 16 | 16 | 25 | 23 | 20 | 19 | 17 | 12 | 12 | 11 | 8 | ||||
| Michigan | 8 | 8 | 17 | 18 | 19 | 14 | 14 | 13 | 12 | 10 | 9 | 7 | 13 | 14 | 13 | 14 |
| Wisconsin | 21 | 21 | 20 | 20 | 20 | 15 | 10 | 6 | 6 | 5 | 4 | 9 | 20 | 17 | 16 | 17 |
| Ohio State | 9 | 9 | 9 | 7 | 7 | 18 | 25 | 25 | 24 | 20 | ||||||
| Minnesota | 25 | 22 | 22 | 19 | 18 | 13 | 19 | 24 | ||||||||
| Purdue | 24 | 25 | 18 | 15 | 15 | 9 | 5 | 12 | 17 |
| Date | Bowl | Winner/Tie | Pts | Loser/Tie | Pts | Notes |
|---|---|---|---|---|---|---|
| 2005-01-01 | Capital One Bowl | Iowa | 30 | Louisiana State | 25 | Capital One Bowl (Orlando, FL) |
| 2005-01-01 | Outback Bowl | Georgia | 24 | Wisconsin | 21 | Outback Bowl (Tampa, FL) |
| 2005-01-01 | Rose Bowl | Texas | 38 | Michigan | 37 | Rose Bowl (Pasadena, CA) |
| 2004-12-31 | Music City Bowl | Minnesota | 20 | Alabama | 16 | Music City Bowl (Nashville, TN) |
| 2004-12-31 | Sun Bowl | Arizona State | 27 | Purdue | 23 | Sun Bowl (El Paso, TX) |
| 2004-12-29 | Alamo Bowl | Ohio State | 33 | Oklahoma State | 7 | Alamo Bowl (San Antonio, TX) |
| Big Ten Defensive Player of the Year: | Erasmus James (Wisconsin) |
| Big Ten Offensive Player of the Year: | Braylon Edwards (Michigan) |
| Big Ten Coach of the Year: | Kirk Ferentz (Iowa) |