| Week | Rank | Rate | Record | SOS | Opponent | Score | Rank Then | Rank Now |
| 0 | 9 | 0.000 | (0,0) | 0.000 | --bye-- |
| 1 | 7 | 0.500 | (1,0) | -0.500 | Buffalo | 23 to 10 | 518 | 184 |
| 2 | 134 | 0.600 | (2,0) | -0.400 | Northwestern LA | 66 to 0 | 408 | 362 |
| 3 | 155 | 0.813 | (2,1) | 0.479 | California | 14 to 27 | 104 | 68 |
| 4 | 128 | 0.998 | (2,1) | 0.664 | --bye-- |
| 5 | 81 | 1.409 | (3,1) | 0.909 | Rutgers | 31 to 28 | 106 | 75 |
| 6 | 76 | 1.350 | (3,2) | 1.150 | Ohio St | 3 to 42 | 7 | 4 |
| 7 | 56 | 1.584 | (4,2) | 1.250 | Purdue | 27 to 20 | 91 | 111 |
| 8 | 45 | 1.651 | (5,2) | 1.222 | Nebraska | 24 to 6 | 49 | 55 |
| 9 | 59 | 1.507 | (5,3) | 1.257 | Iowa | 3 to 41 | 44 | 27 |
| 10 | 50 | 1.568 | (6,3) | 1.235 | Michigan St | 23 to 20 | 93 | 89 |
| 11 | 46 | 1.607 | (6,3) | 1.274 | --bye-- |
| 12 | 52 | 1.537 | (6,4) | 1.337 | Oregon | 13 to 42 | 9 | 2 |
| 13 | 63 | 1.418 | (6,5) | 1.327 | Northwestern | 35 to 38 | 49 | 48 |
| 14 | 53 | 1.510 | (7,5) | 1.343 | Wisconsin | 17 to 7 | 61 | 59 |
| 15 | 53 | 1.520 | (7,5) | 1.353 | --bye-- |
| 16 | 53 | 1.520 | (7,5) | 1.353 | --bye-- |
| 17 | 50 | 1.535 | (7,5) | 1.369 | --bye-- |
| 18 | 43 | 1.626 | (8,5) | 1.395 | New Mexico | 20 to 17 | 53 | 51 |
| 19 | 44 | 1.623 | (8,5) | 1.392 | --bye-- |
| 20 | | | | | --bye-- |
| 21 | | | | | --bye-- |