| 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 | Colorado St | 50 to 24 | 424 | 128 |
| 3 | 214 | 1.905 | (2,0) | 0.905 | Wisconsin | 31 to 22 | 334 | 53 |
| 4 | 60 | 1.848 | (3,0) | 0.848 | Northern Colorado | 64 to 21 | 357 | 401 |
| 5 | 25 | 2.181 | (4,0) | 1.181 | Oregon St | 38 to 35 | 63 | 25 |
| 6 | 9 | 2.358 | (4,0) | 1.358 | --bye-- |
| 7 | 26 | 2.101 | (4,1) | 1.501 | UCLA | 17 to 25 | 20 | 34 |
| 8 | 32 | 1.869 | (4,2) | 1.535 | Arizona | 6 to 44 | 47 | 12 |
| 9 | 41 | 1.664 | (4,3) | 1.521 | Oregon | 24 to 38 | 16 | 6 |
| 10 | 56 | 1.518 | (4,4) | 1.518 | Arizona St | 27 to 38 | 104 | 87 |
| 11 | 81 | 1.340 | (4,5) | 1.451 | Stanford | 7 to 10 | 78 | 88 |
| 12 | 95 | 1.242 | (4,6) | 1.442 | California | 39 to 42 | 57 | 45 |
| 13 | 76 | 1.344 | (5,6) | 1.435 | Colorado | 56 to 14 | 78 | 84 |
| 14 | 71 | 1.425 | (5,7) | 1.592 | Washington | 21 to 24 | 1 | 1 |
| 15 | 71 | 1.348 | (5,7) | 1.515 | --bye-- |
| 16 | 74 | 1.339 | (5,7) | 1.506 | --bye-- |
| 17 | 71 | 1.327 | (5,7) | 1.494 | --bye-- |
| 18 | 68 | 1.343 | (5,7) | 1.510 | --bye-- |
| 19 | | | | | --bye-- |
| 20 | | | | | --bye-- |