| Week | Rank | Rate | Record | SOS | Opponent | Score | Rank Then | Rank Now |
| 0 | 9 | 0.000 | (0,0) | 0.000 | --bye-- |
| 1 | 188 | 0.000 | (0,0) | 0.000 | --bye-- |
| 2 | 443 | -0.500 | (0,1) | 0.500 | Wartburg | 7 to 21 | 166 | 298 |
| 3 | 208 | 0.591 | (1,1) | 0.591 | Lawrence | 78 to 7 | 454 | 700 |
| 4 | 415 | -0.338 | (2,1) | -0.671 | Lake Forest | 49 to 6 | 578 | 628 |
| 5 | 504 | -0.865 | (2,1) | -1.199 | --bye-- |
| 6 | 572 | -1.172 | (3,1) | -1.672 | Grinnell | 49 to 9 | 684 | 697 |
| 7 | 546 | -1.042 | (4,1) | -1.642 | Illinois Col | 48 to 15 | 594 | 615 |
| 8 | 553 | -1.030 | (5,1) | -1.697 | Cornell IA | 45 to 3 | 669 | 674 |
| 9 | 571 | -1.113 | (6,1) | -1.828 | Beloit | 72 to 0 | 699 | 699 |
| 10 | 540 | -0.980 | (7,1) | -1.730 | Chicago | 29 to 0 | 588 | 620 |
| 11 | 533 | -0.977 | (8,1) | -1.755 | Ripon | 58 to 3 | 665 | 661 |
| 12 | 561 | -1.057 | (9,1) | -1.857 | Knox | 69 to 0 | 695 | 695 |
| 13 | 564 | -1.094 | (9,1) | -1.894 | --bye-- |
| 14 | 561 | -1.084 | (9,2) | -1.720 | St John's MN | 15 to 49 | 310 | 279 |
| 15 | 549 | -1.000 | (9,2) | -1.636 | --bye-- |
| 16 | 549 | -1.013 | (9,2) | -1.649 | --bye-- |
| 17 | 543 | -0.981 | (9,2) | -1.617 | --bye-- |
| 18 | 543 | -0.981 | (9,2) | -1.617 | --bye-- |
| 19 | 546 | -0.985 | (9,2) | -1.621 | --bye-- |
| 20 | | | | | --bye-- |
| 21 | | | | | --bye-- |