| 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 | Drake | 55 to 7 | 424 | 183 |
| 3 | 172 | 2.281 | (2,0) | 1.281 | Northern Arizona | 37 to 22 | 278 | 152 |
| 4 | 221 | 0.695 | (2,1) | 0.361 | Boise St | 18 to 42 | 80 | 46 |
| 5 | 144 | 1.032 | (2,1) | 0.698 | --bye-- |
| 6 | 129 | 1.030 | (2,2) | 1.030 | South Dakota St | 21 to 42 | 42 | 18 |
| 7 | 129 | 1.002 | (3,2) | 0.802 | Western Illinois | 49 to 10 | 492 | 403 |
| 8 | 99 | 1.270 | (4,2) | 0.937 | North Dakota St | 49 to 24 | 103 | 69 |
| 9 | 119 | 1.041 | (4,3) | 0.899 | Northern Iowa | 0 to 27 | 103 | 131 |
| 10 | 111 | 1.139 | (5,3) | 0.889 | Indiana St | 36 to 33 | 389 | 349 |
| 11 | 106 | 1.158 | (6,3) | 0.825 | Murray St | 45 to 31 | 273 | 284 |
| 12 | 110 | 1.110 | (6,4) | 0.910 | South Dakota | 10 to 14 | 44 | 60 |
| 13 | 101 | 1.180 | (7,4) | 0.907 | Illinois St | 22 to 21 | 182 | 199 |
| 14 | 112 | 1.134 | (7,5) | 0.967 | Sacramento St | 35 to 42 | 111 | 122 |
| 15 | 112 | 1.061 | (7,5) | 0.894 | --bye-- |
| 16 | 114 | 1.060 | (7,5) | 0.894 | --bye-- |
| 17 | 118 | 1.029 | (7,5) | 0.862 | --bye-- |
| 18 | 117 | 1.017 | (7,5) | 0.850 | --bye-- |
| 19 | | | | | --bye-- |
| 20 | | | | | --bye-- |