| 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 | W Michigan | 23 to 6 | 518 | 56 |
| 2 | 137 | 0.578 | (2,0) | -0.422 | Boston College | 42 to 40 | 413 | 160 |
| 3 | 91 | 1.258 | (3,0) | 0.258 | Youngstown St | 41 to 24 | 243 | 125 |
| 4 | 52 | 1.580 | (3,1) | 1.080 | USC | 31 to 45 | 15 | 14 |
| 5 | 43 | 1.765 | (3,1) | 1.265 | --bye-- |
| 6 | 61 | 1.485 | (3,2) | 1.285 | Nebraska | 27 to 38 | 37 | 55 |
| 7 | 93 | 1.265 | (3,3) | 1.265 | UCLA | 13 to 38 | 102 | 84 |
| 8 | 84 | 1.264 | (3,4) | 1.407 | Indiana | 13 to 38 | 1 | 1 |
| 9 | 88 | 1.241 | (3,5) | 1.491 | Michigan | 20 to 31 | 17 | 18 |
| 10 | 93 | 1.185 | (3,6) | 1.518 | Minnesota | 20 to 23 | 50 | 44 |
| 11 | 92 | 1.211 | (3,6) | 1.544 | --bye-- |
| 12 | 102 | 1.156 | (3,7) | 1.556 | Penn St | 10 to 28 | 81 | 41 |
| 13 | 115 | 1.084 | (3,8) | 1.539 | Iowa | 17 to 20 | 39 | 27 |
| 14 | 96 | 1.171 | (4,8) | 1.504 | Maryland | 38 to 28 | 122 | 114 |
| 15 | 91 | 1.194 | (4,8) | 1.527 | --bye-- |
| 16 | 91 | 1.197 | (4,8) | 1.531 | --bye-- |
| 17 | 89 | 1.215 | (4,8) | 1.548 | --bye-- |
| 18 | 88 | 1.235 | (4,8) | 1.568 | --bye-- |
| 19 | 89 | 1.224 | (4,8) | 1.558 | --bye-- |
| 20 | | | | | --bye-- |
| 21 | | | | | --bye-- |