| Time | Date | Name | Meet |
|---|---|---|---|
| 46.88 | Feb. 17, 2024 | Mason Kooyman | Ohio Athletic Conference Championships |
| 47.01 | Feb. 18, 2012 | Nic Null | Ohio Athletic Conference Championships |
| 47.22 | Feb. 19, 2011 | Nic Null | Ohio Athletic Conference Championships |
| 47.38 | March 18, 2006 | Douglas Mosiniak | NCAA Division III Mens Championships |
