| 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 | Coastal Carolina | 27 to 13 | 424 | 59 |
| 3 | 99 | 3.340 | (2,0) | 2.340 | San Diego St | 35 to 10 | 153 | 134 |
| 4 | 28 | 2.270 | (3,0) | 1.270 | North Carolina Central | 59 to 7 | 230 | 204 |
| 5 | 37 | 1.892 | (3,1) | 1.392 | Utah | 7 to 14 | 9 | 23 |
| 6 | 43 | 1.811 | (3,1) | 1.311 | --bye-- |
| 7 | 20 | 2.181 | (4,1) | 1.581 | Washington St | 25 to 17 | 26 | 68 |
| 8 | 23 | 2.033 | (4,2) | 1.700 | Oregon St | 24 to 36 | 11 | 25 |
| 9 | 20 | 1.995 | (5,2) | 1.566 | Stanford | 42 to 7 | 110 | 88 |
| 10 | 19 | 2.050 | (6,2) | 1.550 | Colorado | 28 to 16 | 48 | 84 |
| 11 | 31 | 1.875 | (6,3) | 1.541 | Arizona | 10 to 27 | 32 | 12 |
| 12 | 43 | 1.658 | (6,4) | 1.458 | Arizona St | 7 to 17 | 91 | 87 |
| 13 | 35 | 1.716 | (7,4) | 1.444 | Southern Cal | 38 to 20 | 31 | 21 |
| 14 | 40 | 1.687 | (7,5) | 1.520 | California | 7 to 33 | 39 | 45 |
| 15 | 41 | 1.610 | (7,5) | 1.443 | --bye-- |
| 16 | 41 | 1.603 | (7,5) | 1.436 | --bye-- |
| 17 | 35 | 1.661 | (8,5) | 1.430 | Boise St | 35 to 22 | 48 | 46 |
| 18 | 34 | 1.672 | (8,5) | 1.442 | --bye-- |
| 19 | | | | | --bye-- |
| 20 | | | | | --bye-- |