| Week | Rank | Rate | Record | SOS | Opponent | Score | Rank Then | Rank Now |
| 0 | 9 | 0.000 | (0,0) | 0.000 | --bye-- |
| 1 | 518 | -0.500 | (0,1) | 0.500 | Michigan | 17 to 34 | 7 | 18 |
| 2 | 651 | -1.828 | (1,1) | -1.828 | Idaho St | 32 to 22 | 684 | 134 |
| 3 | 309 | 0.182 | (2,1) | -0.151 | UCLA | 35 to 10 | 451 | 84 |
| 4 | 152 | 0.827 | (2,1) | 0.494 | --bye-- |
| 5 | 57 | 1.575 | (3,1) | 1.075 | New Mexico St | 38 to 20 | 101 | 180 |
| 6 | 91 | 1.238 | (3,2) | 1.038 | San Jose St | 28 to 35 | 160 | 168 |
| 7 | 107 | 1.138 | (3,3) | 1.138 | Boise St | 25 to 41 | 45 | 50 |
| 8 | 100 | 1.152 | (4,3) | 1.009 | Nevada | 24 to 22 | 242 | 163 |
| 9 | 79 | 1.304 | (5,3) | 1.054 | Utah St | 33 to 14 | 99 | 106 |
| 10 | 59 | 1.480 | (6,3) | 1.147 | UNLV | 40 to 35 | 57 | 53 |
| 11 | 55 | 1.490 | (6,3) | 1.156 | --bye-- |
| 12 | 51 | 1.543 | (7,3) | 1.143 | Colorado St | 20 to 17 | 152 | 173 |
| 13 | 46 | 1.589 | (8,3) | 1.134 | Air Force | 20 to 3 | 154 | 145 |
| 14 | 43 | 1.634 | (9,3) | 1.134 | San Diego St | 23 to 17 | 54 | 58 |
| 15 | 42 | 1.650 | (9,3) | 1.150 | --bye-- |
| 16 | 43 | 1.632 | (9,3) | 1.132 | --bye-- |
| 17 | 44 | 1.621 | (9,3) | 1.121 | --bye-- |
| 18 | 53 | 1.527 | (9,4) | 1.142 | Minnesota | 17 to 20 | 43 | 44 |
| 19 | 51 | 1.517 | (9,4) | 1.133 | --bye-- |
| 20 | | | | | --bye-- |
| 21 | | | | | --bye-- |