| Week | Rank | Rate | Record | SOS | Opponent | Score | Rank Then | Rank Now |
| 0 | 1 | 0.500 | (1,0) | -0.500 | Stanford | 23 to 20 | 694 | 92 |
| 1 | 187 | 0.125 | (1,1) | 0.125 | Arizona | 6 to 40 | 3 | 29 |
| 2 | 618 | -1.400 | (2,1) | -1.733 | Sam Houston St | 37 to 20 | 674 | 218 |
| 3 | 201 | 0.613 | (3,1) | 0.113 | Portland St | 23 to 3 | 436 | 266 |
| 4 | 141 | 0.915 | (3,2) | 0.715 | Fresno St | 21 to 23 | 73 | 77 |
| 5 | 88 | 1.318 | (4,2) | 0.985 | Air Force | 44 to 35 | 176 | 145 |
| 6 | 90 | 1.244 | (4,2) | 0.911 | --bye-- |
| 7 | 81 | 1.344 | (5,2) | 0.915 | Utah St | 44 to 26 | 106 | 106 |
| 8 | 65 | 1.448 | (6,2) | 0.948 | Colorado St | 31 to 19 | 145 | 173 |
| 9 | 68 | 1.392 | (6,2) | 0.892 | --bye-- |
| 10 | 85 | 1.268 | (6,3) | 0.935 | San Jose St | 38 to 45 | 128 | 168 |
| 11 | 70 | 1.387 | (7,3) | 0.987 | San Diego St | 38 to 6 | 57 | 58 |
| 12 | 65 | 1.432 | (7,3) | 1.032 | --bye-- |
| 13 | 74 | 1.329 | (7,4) | 1.056 | UNLV | 10 to 38 | 37 | 53 |
| 14 | 72 | 1.350 | (8,4) | 1.016 | Wyoming | 27 to 7 | 156 | 155 |
| 15 | 71 | 1.355 | (8,4) | 1.021 | --bye-- |
| 16 | 72 | 1.339 | (8,4) | 1.006 | --bye-- |
| 17 | 71 | 1.333 | (8,4) | 1.000 | --bye-- |
| 18 | 65 | 1.402 | (9,4) | 1.017 | California | 35 to 31 | 73 | 68 |
| 19 | 65 | 1.399 | (9,4) | 1.014 | --bye-- |
| 20 | | | | | --bye-- |
| 21 | | | | | --bye-- |