| Week | Rank | Rate | Record | SOS | Opponent | Score | Rank Then | Rank Now |
| 1 | 40 | 0.000 | (0,0) | 0.000 | --bye-- |
| 2 | 29 | 0.500 | (1,0) | -0.500 | Toledo | 30 to 28 | 424 | 51 |
| 3 | 262 | 1.281 | (1,1) | 1.281 | Kansas | 23 to 34 | 160 | 24 |
| 4 | 57 | 1.888 | (1,2) | 2.221 | Penn State | 13 to 30 | 11 | 11 |
| 5 | 51 | 1.749 | (2,2) | 1.749 | Florida Atlantic | 23 to 17 | 200 | 179 |
| 6 | 69 | 1.529 | (2,3) | 1.729 | Purdue | 19 to 44 | 78 | 83 |
| 7 | 87 | 1.369 | (2,4) | 1.703 | Nebraska | 7 to 20 | 65 | 81 |
| 8 | 60 | 1.526 | (3,4) | 1.669 | Maryland | 27 to 24 | 54 | 36 |
| 9 | 70 | 1.407 | (3,5) | 1.657 | Wisconsin | 21 to 25 | 26 | 53 |
| 10 | 70 | 1.439 | (3,5) | 1.689 | --bye-- |
| 11 | 55 | 1.541 | (4,5) | 1.652 | Minnesota | 27 to 26 | 46 | 61 |
| 12 | 52 | 1.552 | (5,5) | 1.552 | Indiana | 48 to 45 | 99 | 125 |
| 13 | 62 | 1.462 | (5,6) | 1.553 | Iowa | 13 to 15 | 14 | 16 |
| 14 | 68 | 1.442 | (5,7) | 1.609 | Northwestern | 43 to 45 | 44 | 35 |
| 15 | 72 | 1.347 | (5,7) | 1.513 | --bye-- |
| 16 | 72 | 1.343 | (5,7) | 1.510 | --bye-- |
| 17 | 72 | 1.324 | (5,7) | 1.490 | --bye-- |
| 18 | 73 | 1.324 | (5,7) | 1.491 | --bye-- |
| 19 | | | | | --bye-- |
| 20 | | | | | --bye-- |