| 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 | SUNY Albany | 34 to 7 | 518 | 327 |
| 2 | 613 | -1.323 | (1,1) | -1.323 | Iowa St | 13 to 16 | 416 | 28 |
| 3 | 307 | 0.217 | (2,1) | -0.116 | Massachusetts | 47 to 7 | 486 | 335 |
| 4 | 121 | 1.060 | (3,1) | 0.560 | Rutgers | 38 to 28 | 111 | 75 |
| 5 | 91 | 1.295 | (3,2) | 1.095 | Indiana | 15 to 20 | 6 | 1 |
| 6 | 95 | 1.211 | (3,2) | 1.011 | --bye-- |
| 7 | 78 | 1.373 | (4,2) | 1.040 | Wisconsin | 37 to 0 | 122 | 59 |
| 8 | 63 | 1.470 | (5,2) | 1.041 | Penn St | 25 to 24 | 111 | 41 |
| 9 | 44 | 1.651 | (6,2) | 1.151 | Minnesota | 41 to 3 | 59 | 44 |
| 10 | 45 | 1.646 | (6,2) | 1.146 | --bye-- |
| 11 | 45 | 1.623 | (6,3) | 1.290 | Oregon | 16 to 18 | 8 | 2 |
| 12 | 49 | 1.586 | (6,4) | 1.386 | USC | 21 to 26 | 10 | 14 |
| 13 | 39 | 1.664 | (7,4) | 1.391 | Michigan St | 20 to 17 | 115 | 89 |
| 14 | 34 | 1.736 | (8,4) | 1.403 | Nebraska | 40 to 16 | 58 | 55 |
| 15 | 34 | 1.756 | (8,4) | 1.423 | --bye-- |
| 16 | 33 | 1.760 | (8,4) | 1.427 | --bye-- |
| 17 | 32 | 1.776 | (8,4) | 1.442 | --bye-- |
| 18 | 31 | 1.805 | (8,4) | 1.472 | --bye-- |
| 19 | 27 | 1.886 | (9,4) | 1.501 | Vanderbilt | 34 to 27 | 22 | 22 |
| 20 | | | | | --bye-- |
| 21 | | | | | --bye-- |