| 1) | Morgan, Dameon | Mississippi | 1:48.88 (05/02) | 1:48.93 (05/14-05/16) | 1:50.16 (04/17-04/18) | 1:50.31 (04/22-04/26) | 1:51.04 (04/03-04/04) | 1:53.25 (04/10) |
| 2) | Soratos, Cristian | Montana State | 1:48.88 (04/10) | 1:49.22 (05/13-05/16) | 1:49.87 (04/17-04/18) | 1:51.38 (05/13-05/16) | 1:53.39 (04/25) |