| Week | Rank | Rate | Record | SOS | Opponent | Score | Rank Then | Rank Now |
| 0 | 9 | 0.000 | (0,0) | 0.000 | --bye-- |
| 1 | 698 | -1.167 | (0,1) | -0.167 | Kansas St | 35 to 38 | 512 | 54 |
| 2 | 657 | -1.960 | (1,1) | -1.960 | Portland St | 50 to 20 | 671 | 265 |
| 3 | 298 | 0.260 | (1,2) | 0.594 | Montana | 23 to 24 | 53 | 44 |
| 4 | 253 | 0.358 | (2,2) | 0.358 | Valparaiso | 58 to 7 | 569 | 410 |
| 5 | 204 | 0.583 | (2,2) | 0.583 | --bye-- |
| 6 | 184 | 0.678 | (3,2) | 0.478 | Northern Iowa | 35 to 7 | 242 | 229 |
| 7 | 130 | 0.990 | (4,2) | 0.657 | Youngstown St | 35 to 17 | 174 | 126 |
| 8 | 105 | 1.104 | (5,2) | 0.675 | S Illinois | 38 to 19 | 148 | 141 |
| 9 | 98 | 1.174 | (6,2) | 0.674 | Indiana St | 46 to 17 | 174 | 189 |
| 10 | 107 | 1.090 | (6,3) | 0.757 | South Dakota | 21 to 26 | 105 | 80 |
| 11 | 117 | 1.054 | (6,4) | 0.854 | N Dakota St | 10 to 15 | 33 | 47 |
| 12 | 119 | 1.065 | (7,4) | 0.792 | Murray St | 35 to 17 | 330 | 299 |
| 13 | 136 | 0.939 | (7,5) | 0.773 | S Dakota St | 31 to 34 | 98 | 87 |
| 14 | 117 | 1.051 | (8,5) | 0.820 | Tennessee Tech | 31 to 6 | 112 | 109 |
| 15 | 118 | 1.015 | (8,6) | 0.872 | Tarleton St | 13 to 31 | 60 | 69 |
| 16 | 119 | 1.008 | (8,6) | 0.865 | --bye-- |
| 17 | 117 | 1.014 | (8,6) | 0.871 | --bye-- |
| 18 | 115 | 1.020 | (8,6) | 0.877 | --bye-- |
| 19 | 117 | 1.017 | (8,6) | 0.874 | --bye-- |
| 20 | 117 | 1.011 | (8,6) | 0.868 | --bye-- |
| 21 | 117 | 1.011 | (8,6) | 0.868 | --bye-- |