| Ratings | ||
|---|---|---|
| Rank | 1 | |
| Conf | Big Ten | |
| W-L | 15-0 | |
| Off | 89 | |
| Def | 120 | |

| Date | Opponent | Expected | Outcome | Location | Record |
|---|---|---|---|---|---|
| Sat Sep 28 |
Minnesota
|
W by 11 | W 27-24 | Home | 4-1 |
| Sat Sep 21 |
USC 11
|
L by 4 | W 27-24 | Home | 3-1 |
| Sat Sep 14 |
Arkansas State
|
W by 21.5 | W 28-18 | Home | 2-1 |
| Sat Sep 7 |
Texas 3
|
L by 6.5 | L 31-12 | Home | 1-1 |
| Sat Aug 31 |
Fresno State
|
W by 20.5 | W 30-10 | Home | 1-0 |
| Mon Jan 8 |
Washington 2
|
W by 4.5 | W 34-13 | Neutral | 15-0 |
| Mon Jan 1 |
Alabama 4
|
W by 2 | W 27-20 | Neutral | 14-0 |
| Sat Dec 2 |
Iowa 16
|
W by 21.5 | W 26-0 | Neutral | 13-0 |
| Sat Nov 25 |
Ohio State 2
|
W by 3 | W 30-24 | Home | 12-0 |
| Sat Nov 18 |
Maryland
|
W by 17.5 | W 31-24 | Away | 11-0 |
| Sat Nov 11 |
Penn State 10
|
W by 4.5 | W 24-15 | Away | 10-0 |
| Sat Nov 4 |
Purdue
|
W by 31 | W 41-13 | Home | 9-0 |
| Sat Oct 21 |
Michigan State
|
W by 25.5 | W 49-0 | Away | 8-0 |
| Sat Oct 14 |
Indiana
|
W by 32.5 | W 52-7 | Home | 7-0 |
| Sat Oct 7 |
Minnesota
|
W by 19 | W 52-10 | Away | 6-0 |
| Sat Sep 30 |
Nebraska
|
W by 17 | W 45-7 | Away | 5-0 |
| Sat Sep 23 |
Rutgers
|
W by 24 | W 31-7 | Home | 4-0 |
| Sat Sep 16 |
Bowling Green
|
W by 41 | W 31-6 | Home | 3-0 |
| Sat Sep 9 |
UNLV
|
W by 38 | W 35-7 | Home | 2-0 |
| Sat Sep 2 |
East Carolina
|
W by 35.5 | W 30-3 | Home | 1-0 |