| 1) | Arsenault, Calvin | Louisville | 51.90 (04/06) | 52.03 (03/22-03/23) | 53.25 (05/03-05/05) | 53.34 (04/13) | 53.65 (03/14-03/16) | 54.41 (04/19) | |
| 2) | Bughman, Grant | Wisconsin | 51.90 (05/03-05/04) | 52.36 (04/20) | 52.43 (05/10-05/12) | 52.48 (05/10-05/12) | 53.07 (04/26-04/27) | 53.14 (04/12-04/13) | 55.72 (03/29-03/30) |