| Week | Rank | Rate | Record | SOS | Opponent | Score | Rank Then | Rank Now |
| 1 | 40 | 0.000 | (0,0) | 0.000 | --bye-- |
| 2 | 424 | -0.500 | (0,1) | 0.500 | Eastern Illinois | 0 to 27 | 29 | 165 |
| 3 | 236 | 1.594 | (0,2) | 2.594 | Indiana | 7 to 41 | 145 | 125 |
| 4 | 314 | 0.278 | (0,3) | 1.278 | Ball St | 7 to 45 | 125 | 182 |
| 5 | 366 | 0.013 | (0,3) | 1.013 | --bye-- |
| 6 | 397 | -0.139 | (0,4) | 0.861 | Murray St | 28 to 30 | 175 | 284 |
| 7 | 397 | -0.130 | (0,5) | 0.870 | Northern Iowa | 20 to 27 | 125 | 131 |
| 8 | 450 | -0.283 | (0,6) | 0.717 | Illinois St | 7 to 44 | 233 | 199 |
| 9 | 410 | -0.134 | (0,7) | 0.866 | South Dakota | 3 to 17 | 50 | 60 |
| 10 | 389 | -0.077 | (0,8) | 0.923 | North Dakota | 33 to 36 | 111 | 117 |
| 11 | 363 | -0.010 | (0,9) | 0.990 | Youngstown St | 7 to 19 | 105 | 115 |
| 12 | 337 | 0.080 | (1,9) | 0.880 | Western Illinois | 27 to 6 | 431 | 403 |
| 13 | 338 | 0.070 | (1,10) | 0.888 | Southern Illinois | 9 to 38 | 106 | 114 |
| 14 | 333 | 0.097 | (1,10) | 0.915 | --bye-- |
| 15 | 342 | 0.000 | (1,10) | 0.818 | --bye-- |
| 16 | 344 | -0.011 | (1,10) | 0.807 | --bye-- |
| 17 | 348 | -0.038 | (1,10) | 0.780 | --bye-- |
| 18 | 349 | -0.050 | (1,10) | 0.768 | --bye-- |
| 19 | | | | | --bye-- |
| 20 | | | | | --bye-- |