| 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 | Florida | 24 to 11 | 424 | 76 |
| 3 | 29 | 5.387 | (2,0) | 4.387 | Baylor | 20 to 13 | 58 | 133 |
| 4 | 38 | 2.163 | (3,0) | 1.163 | Weber St | 31 to 7 | 119 | 138 |
| 5 | 9 | 2.572 | (4,0) | 1.572 | UCLA | 14 to 7 | 37 | 34 |
| 6 | 18 | 2.217 | (4,1) | 1.617 | Oregon St | 7 to 21 | 24 | 25 |
| 7 | 16 | 2.200 | (4,1) | 1.600 | --bye-- |
| 8 | 15 | 2.227 | (5,1) | 1.561 | California | 34 to 14 | 65 | 45 |
| 9 | 8 | 2.310 | (6,1) | 1.596 | Southern Cal | 34 to 32 | 22 | 21 |
| 10 | 14 | 2.154 | (6,2) | 1.654 | Oregon | 6 to 35 | 11 | 6 |
| 11 | 15 | 2.111 | (7,2) | 1.556 | Arizona St | 55 to 3 | 107 | 87 |
| 12 | 16 | 2.071 | (7,3) | 1.671 | Washington | 28 to 35 | 1 | 1 |
| 13 | 21 | 1.946 | (7,4) | 1.674 | Arizona | 18 to 42 | 20 | 12 |
| 14 | 18 | 2.041 | (8,4) | 1.707 | Colorado | 23 to 17 | 85 | 84 |
| 15 | 17 | 1.964 | (8,4) | 1.631 | --bye-- |
| 16 | 19 | 1.955 | (8,4) | 1.622 | --bye-- |
| 17 | 18 | 1.945 | (8,4) | 1.611 | --bye-- |
| 18 | 23 | 1.867 | (8,5) | 1.636 | Northwestern | 7 to 14 | 35 | 35 |
| 19 | | | | | --bye-- |
| 20 | | | | | --bye-- |