| 1) | Gipson, Levi | Nebraska | 46.44 (05/10-05/12) | 46.50 (05/10-05/12) | 46.64 (04/13) | 46.93 (03/29-03/30) | 47.12 (05/05) | 47.28 (04/06) | |
| 2) | Scott, Jordan | UC Santa Barbara | 46.44 (05/10-05/11) | 47.04 (05/10-05/11) | 47.08 (05/04) | 47.47 (04/27) | 47.88 (03/15-03/16) | 48.21 (03/29-03/30) | 49.50 (04/19) |