| Time | Date | Name | Meet |
|---|---|---|---|
| 46.66 | March 22, 2019 | David Fitch | NCAA Division III Championships |
| 47.19 | March 21, 2019 | David Fitch | NCAA Division III Championships |
| 47.89 | Feb. 15, 2019 | David Fitch | North Coast Athletic Conference Championships |
| 48.15 | Dec. 1, 2017 | Ben Baturka | Total Performance Invitational |
| 48.19 | March 19, 2015 | Harrison Curley | NCAA Division III Championships |
| 48.66 | Dec. 5, 2014 | Harrison Curley | Total Performance Invitational |
| 48.68 | March 21, 2008 | Joshua Mitchell | NCAA Division III Mens Championship |
| 49.27 | March 20, 2008 | Joshua Mitchell | NCAA Division III Mens Championship |
| 49.51 | March 16, 2007 | Joshua Mitchell | NCAA Division III Mens Championships |
| 49.69 | March 16, 2006 | Andrejs Duda | NCAA Division III Mens Championships |
