| 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 | Nicholls St | 38 to 24 | 424 | 208 |
| 3 | 74 | 4.070 | (2,0) | 3.070 | TAMU-Commerce | 34 to 6 | 123 | 465 |
| 4 | 40 | 2.150 | (3,0) | 1.150 | Stanford | 30 to 23 | 111 | 88 |
| 5 | 121 | 1.179 | (3,1) | 0.679 | Idaho | 27 to 36 | 77 | 95 |
| 6 | 90 | 1.340 | (4,1) | 0.740 | Northern Arizona | 31 to 30 | 249 | 152 |
| 7 | 73 | 1.453 | (4,1) | 0.853 | --bye-- |
| 8 | 82 | 1.350 | (5,1) | 0.683 | Northern Colorado | 21 to 13 | 365 | 401 |
| 9 | 109 | 1.134 | (5,2) | 0.705 | Montana St | 30 to 42 | 66 | 97 |
| 10 | 95 | 1.238 | (6,2) | 0.738 | Idaho St | 51 to 16 | 187 | 246 |
| 11 | 112 | 1.120 | (6,3) | 0.787 | Montana | 7 to 34 | 63 | 43 |
| 12 | 112 | 1.093 | (7,3) | 0.693 | Cal Poly SLO | 41 to 30 | 302 | 304 |
| 13 | 132 | 0.976 | (7,4) | 0.703 | UC-Davis | 21 to 31 | 119 | 119 |
| 14 | 111 | 1.140 | (8,4) | 0.806 | North Dakota | 42 to 35 | 112 | 117 |
| 15 | 117 | 1.023 | (8,5) | 0.793 | South Dakota | 24 to 34 | 49 | 60 |
| 16 | 122 | 1.006 | (8,5) | 0.775 | --bye-- |
| 17 | 125 | 0.998 | (8,5) | 0.767 | --bye-- |
| 18 | 122 | 0.988 | (8,5) | 0.758 | --bye-- |
| 19 | | | | | --bye-- |
| 20 | | | | | --bye-- |