| 1) | Ibadin, Edose | Hampton | 1:49.44 (04/12-04/13) | 1:50.60 (05/02-05/04) | 1:50.72 (05/10-05/12) | 1:52.07 (05/02-05/04) | 1:53.97 (04/04-04/06) | |
| 2) | Tex, Matthew | Montana State | 1:49.44 (04/11-04/13) | 1:51.24 (05/03) | 1:51.28 (05/08-05/11) | 1:51.56 (05/08-05/11) | 1:51.64 (04/27) | 1:52.64 (03/30) |