| Week | Rank | Rate | Record | SOS | Opponent | Score | Rank Then | Rank Now |
| 0 | 1 | 0.500 | (1,0) | -0.500 | Kansas St | 24 to 21 | 694 | 66 |
| 1 | 4 | 0.833 | (2,0) | -0.167 | South Dakota | 55 to 7 | 512 | 105 |
| 2 | 416 | -0.422 | (3,0) | -1.422 | Iowa | 16 to 13 | 613 | 45 |
| 3 | 68 | 1.432 | (4,0) | 0.432 | Arkansas St | 24 to 16 | 176 | 100 |
| 4 | 22 | 1.932 | (4,0) | 0.932 | --bye-- |
| 5 | 15 | 2.209 | (5,0) | 1.209 | Arizona | 39 to 14 | 32 | 44 |
| 6 | 26 | 1.989 | (5,1) | 1.322 | Cincinnati | 30 to 38 | 31 | 36 |
| 7 | 32 | 1.905 | (5,2) | 1.477 | Colorado | 17 to 24 | 48 | 64 |
| 8 | 31 | 1.905 | (5,2) | 1.476 | --bye-- |
| 9 | 32 | 1.895 | (5,3) | 1.645 | BYU | 27 to 41 | 8 | 4 |
| 10 | 38 | 1.800 | (5,4) | 1.689 | Arizona St | 19 to 24 | 23 | 23 |
| 11 | | | | | TCU | | | 29 |
| 12 | | | | | --bye-- |
| 13 | | | | | Kansas | | | 74 |
| 14 | | | | | Oklahoma St | | | 160 |
| 15 | | | | | --bye-- |
| 16 | | | | | --bye-- |
| 17 | | | | | --bye-- |
| 18 | | | | | --bye-- |
| 19 | | | | | --bye-- |
| 20 | | | | | --bye-- |
| 21 | | | | | --bye-- |