| 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 | Portland St | 81 to 7 | 424 | 191 |
| 3 | 370 | 0.500 | (2,0) | -0.500 | Texas Tech | 38 to 30 | 526 | 40 |
| 4 | 42 | 2.100 | (3,0) | 1.100 | Hawaii | 55 to 10 | 194 | 118 |
| 5 | 12 | 2.433 | (4,0) | 1.433 | Colorado | 42 to 6 | 16 | 84 |
| 6 | 15 | 2.245 | (5,0) | 1.245 | Stanford | 42 to 6 | 136 | 88 |
| 7 | 13 | 2.255 | (5,0) | 1.255 | --bye-- |
| 8 | 19 | 2.096 | (5,1) | 1.430 | Washington | 33 to 36 | 2 | 1 |
| 9 | 16 | 2.045 | (6,1) | 1.331 | Washington St | 38 to 24 | 41 | 68 |
| 10 | 11 | 2.228 | (7,1) | 1.478 | Utah | 35 to 6 | 14 | 23 |
| 11 | 11 | 2.238 | (8,1) | 1.460 | California | 63 to 19 | 66 | 45 |
| 12 | 8 | 2.330 | (9,1) | 1.530 | Southern Cal | 36 to 27 | 22 | 21 |
| 13 | 8 | 2.299 | (10,1) | 1.481 | Arizona St | 49 to 13 | 90 | 87 |
| 14 | 7 | 2.431 | (11,1) | 1.597 | Oregon St | 31 to 7 | 20 | 25 |
| 15 | 8 | 2.303 | (11,2) | 1.610 | Washington | 31 to 34 | 1 | 1 |
| 16 | 8 | 2.295 | (11,2) | 1.603 | --bye-- |
| 17 | 8 | 2.283 | (11,2) | 1.591 | --bye-- |
| 18 | 6 | 2.336 | (12,2) | 1.622 | Liberty | 45 to 6 | 27 | 27 |
| 19 | | | | | --bye-- |
| 20 | | | | | --bye-- |