| Week | Rank | Rate | Record | SOS | Opponent | Score | Rank Then | Rank Now |
| 0 | 9 | 0.000 | (0,0) | 0.000 | --bye-- |
| 1 | 512 | -0.167 | (0,1) | 0.833 | Iowa St | 7 to 55 | 4 | 28 |
| 2 | 628 | -1.422 | (0,2) | -0.422 | Lamar | 13 to 20 | 415 | 135 |
| 3 | 285 | 0.341 | (1,2) | 0.675 | N Colorado | 24 to 17 | 465 | 219 |
| 4 | 88 | 1.255 | (2,2) | 1.255 | Drake | 42 to 21 | 150 | 147 |
| 5 | 126 | 1.075 | (2,3) | 1.275 | N Dakota St | 13 to 51 | 79 | 47 |
| 6 | 129 | 0.977 | (3,3) | 0.977 | Murray St | 49 to 24 | 356 | 296 |
| 7 | 99 | 1.208 | (4,3) | 1.065 | Indiana St | 19 to 14 | 155 | 189 |
| 8 | 99 | 1.155 | (5,3) | 0.905 | Northern Iowa | 17 to 14 | 215 | 228 |
| 9 | 124 | 0.999 | (5,4) | 0.888 | Illinois St | 13 to 21 | 119 | 63 |
| 10 | 105 | 1.099 | (6,4) | 0.899 | North Dakota | 26 to 21 | 107 | 117 |
| 11 | 95 | 1.199 | (7,4) | 0.926 | S Dakota St | 24 to 17 | 98 | 86 |
| 12 | 90 | 1.250 | (8,4) | 0.917 | S Illinois | 53 to 51 | 153 | 142 |
| 13 | 93 | 1.208 | (8,4) | 0.874 | --bye-- |
| 14 | 79 | 1.265 | (9,4) | 0.881 | Drake | 38 to 17 | 152 | 147 |
| 15 | 74 | 1.325 | (10,4) | 0.896 | Mercer | 47 to 0 | 123 | 122 |
| 16 | 78 | 1.283 | (10,5) | 0.949 | Montana | 22 to 52 | 38 | 45 |
| 17 | 76 | 1.293 | (10,5) | 0.960 | --bye-- |
| 18 | 78 | 1.297 | (10,5) | 0.964 | --bye-- |
| 19 | 79 | 1.295 | (10,5) | 0.962 | --bye-- |
| 20 | | | | | --bye-- |
| 21 | | | | | --bye-- |