| 1) | Freet, Ethan | Ohio Wesleyan | 49.43 (02/11) | 49.58 (02/25) | 49.59 (03/02-03/03) | 50.09 (03/02-03/03) | 50.17 (01/28) | 50.66 (12/03) |
| 2) | McKinney, Dan | NYU | 49.43 (02/25-02/26) | 49.85 (03/02-03/03) | 50.04 (02/25-02/26) | 50.17 (02/10-02/11) | 51.17 (01/26-01/27) | 51.35 (02/03-02/04) |