| 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 | Hawaii | 37 to 24 | 424 | 118 |
| 3 | 78 | 3.948 | (1,1) | 3.948 | Southern Cal | 10 to 56 | 40 | 21 |
| 4 | 111 | 1.406 | (1,2) | 1.740 | Sacramento St | 23 to 30 | 40 | 122 |
| 5 | 183 | 0.778 | (1,3) | 1.278 | Arizona | 20 to 21 | 107 | 12 |
| 6 | 136 | 0.991 | (1,4) | 1.591 | Oregon | 6 to 42 | 15 | 6 |
| 7 | 124 | 1.036 | (1,4) | 1.636 | --bye-- |
| 8 | 95 | 1.278 | (2,4) | 1.611 | Colorado | 46 to 43 | 45 | 84 |
| 9 | 110 | 1.134 | (2,5) | 1.562 | UCLA | 7 to 42 | 20 | 34 |
| 10 | 89 | 1.272 | (2,6) | 1.772 | Washington | 33 to 42 | 2 | 1 |
| 11 | 78 | 1.364 | (3,6) | 1.697 | Washington St | 10 to 7 | 81 | 68 |
| 12 | 85 | 1.323 | (3,7) | 1.723 | Oregon St | 17 to 62 | 17 | 25 |
| 13 | 93 | 1.232 | (3,8) | 1.687 | California | 15 to 27 | 50 | 45 |
| 14 | 90 | 1.290 | (3,9) | 1.790 | Notre Dame | 23 to 56 | 22 | 15 |
| 15 | 93 | 1.210 | (3,9) | 1.710 | --bye-- |
| 16 | 92 | 1.201 | (3,9) | 1.701 | --bye-- |
| 17 | 93 | 1.188 | (3,9) | 1.688 | --bye-- |
| 18 | 88 | 1.218 | (3,9) | 1.718 | --bye-- |
| 19 | | | | | --bye-- |
| 20 | | | | | --bye-- |