| 1) | Holmes, Ethan | Iowa | 50.67 (04/06) | 50.73 (05/10-05/12) | 50.78 (05/10-05/12) | 51.75 (03/22-03/23) | ||||
| 2) | Coleman, Gregory | Texas A&M | 50.67 (04/20) | 51.33 (04/06) | 51.52 (03/15-03/16) | 51.74 (04/13) | 52.04 (05/09-05/12) | 52.17 (03/22-03/23) | 52.30 (03/27-03/30) | 52.39 (03/27-03/30) |