| 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 | Claremont-Mudd-Scripps | 15 to 24 | 29 | 454 |
| 3 | 590 | -1.000 | (0,2) | 0.000 | Monmouth IL | 6 to 39 | 459 | 527 |
| 4 | 623 | -1.158 | (1,2) | -0.825 | Knox | 63 to 0 | 699 | 736 |
| 5 | 655 | -1.260 | (1,2) | -0.927 | --bye-- |
| 6 | 656 | -1.200 | (2,2) | -1.200 | Beloit | 48 to 7 | 756 | 753 |
| 7 | 702 | -1.465 | (2,3) | -1.265 | Illinois College | 20 to 41 | 525 | 537 |
| 8 | 671 | -1.218 | (3,3) | -1.218 | Ripon | 21 to 6 | 729 | 681 |
| 9 | 688 | -1.254 | (3,4) | -1.111 | Cornell IA | 34 to 47 | 657 | 639 |
| 10 | 683 | -1.255 | (4,4) | -1.255 | Lawrence | 55 to 12 | 762 | 761 |
| 11 | 678 | -1.216 | (5,4) | -1.327 | Grinnell | 48 to 14 | 750 | 749 |
| 12 | 649 | -1.041 | (6,4) | -1.241 | Lake Forest | 15 to 14 | 632 | 622 |
| 13 | 631 | -0.976 | (6,4) | -1.176 | --bye-- |
| 14 | 633 | -0.992 | (6,4) | -1.192 | --bye-- |
| 15 | 630 | -1.041 | (6,4) | -1.241 | --bye-- |
| 16 | 637 | -1.080 | (6,4) | -1.280 | --bye-- |
| 17 | 641 | -1.100 | (6,4) | -1.300 | --bye-- |
| 18 | 643 | -1.119 | (6,4) | -1.319 | --bye-- |
| 19 | | | | | --bye-- |
| 20 | | | | | --bye-- |