| 1) | Claassen, Roos-Sanne | Tulsa | 1:01.24 (04/19) | 1:01.33 (05/02) | 1:01.37 (05/15-05/18) | 1:02.27 (04/11-04/12) | 1:02.35 (03/26-03/29) | 1:05.08 (03/21-03/22) | |
| 2) | Nwachukwu, Michelle | Baylor | 1:01.24 (04/03-04/05) | 1:01.70 (03/26-03/29) | 1:01.93 (04/19) | 1:02.70 (04/12) | 1:03.00 (03/20-03/21) | 1:03.55 (05/03) | 1:20.90 (05/16-05/18) |