| 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 | TCU | 45 to 42 | 424 | 70 |
| 3 | 41 | 5.007 | (2,0) | 4.007 | Nebraska | 36 to 14 | 77 | 81 |
| 4 | 6 | 2.739 | (3,0) | 1.739 | Colorado St | 43 to 35 | 127 | 128 |
| 5 | 16 | 2.314 | (3,1) | 1.814 | Oregon | 6 to 42 | 12 | 6 |
| 6 | 35 | 1.956 | (3,2) | 1.756 | Southern Cal | 41 to 48 | 23 | 21 |
| 7 | 30 | 1.899 | (4,2) | 1.566 | Arizona St | 27 to 24 | 155 | 87 |
| 8 | 45 | 1.668 | (4,3) | 1.526 | Stanford | 43 to 46 | 95 | 88 |
| 9 | 48 | 1.593 | (4,3) | 1.451 | --bye-- |
| 10 | 48 | 1.643 | (4,4) | 1.643 | UCLA | 16 to 28 | 19 | 34 |
| 11 | 59 | 1.498 | (4,5) | 1.609 | Oregon St | 19 to 26 | 19 | 25 |
| 12 | 68 | 1.428 | (4,6) | 1.628 | Arizona | 31 to 34 | 28 | 12 |
| 13 | 78 | 1.313 | (4,7) | 1.585 | Washington St | 14 to 56 | 76 | 68 |
| 14 | 85 | 1.332 | (4,8) | 1.666 | Utah | 17 to 23 | 18 | 23 |
| 15 | 90 | 1.251 | (4,8) | 1.585 | --bye-- |
| 16 | 89 | 1.244 | (4,8) | 1.577 | --bye-- |
| 17 | 86 | 1.239 | (4,8) | 1.572 | --bye-- |
| 18 | 84 | 1.253 | (4,8) | 1.586 | --bye-- |
| 19 | | | | | --bye-- |
| 20 | | | | | --bye-- |