| 1) | McLaughlin, Taylor | Michigan | 50.86 (04/14-04/15) | 50.88 (05/12-05/14) | 51.27 (04/01) | 51.48 (03/24-03/25) | 51.73 (05/12-05/14) | 52.00 (04/28-04/29) |
| 2) | Chambers, Travius | Arkansas | 50.86 (05/11-05/13) | 51.36 (05/11-05/13) | 51.57 (05/05) | 51.57 (04/28-04/29) | 52.77 (04/21-04/22) | 53.00 (04/08) |