| 1) | HENRY, Ashley | North Texas | 54.96 (05/03) | 54.97 (05/15-05/18) | 55.54 (05/15-05/18) | 56.27 (04/05) | 56.67 (04/12) | |||
| 2) | Walter, Allison | Saint Louis | 54.96 (05/03-05/04) | 55.15 (05/03-05/04) | 56.21 (04/16-04/19) | 56.35 (04/11-04/12) | 56.45 (05/09) | 56.75 (03/27-03/29) | 56.83 (04/16-04/19) | 57.66 (03/21-03/22) |