| 1) | Gonzalez, Melissa | Texas | 57.95 (04/23) | 58.54 (03/25-03/26) | 58.94 (03/30-04/02) | 58.99 (05/13-05/15) | 59.33 (05/13-05/15) | 59.38 (03/30-04/02) | 59.40 (04/16) | 59.72 (04/27-04/30) |
| 2) | Pahlitzsch, Karolina | Nebraska | 57.95 (05/13-05/15) | 58.63 (05/13-05/15) | 58.71 (05/07) | 59.15 (04/27-04/30) | 1:00.30 (04/09) | 1:01.61 (04/16) |