| Time | Date | Name | Meet |
|---|---|---|---|
| 44.28 | March 21, 2015 | Karl Mering | NCAA Division III Championships |
| 45.18 | March 22, 2014 | Karl Mering | NCAA Division III Championships |
| 45.46 | Feb. 10, 2013 | Karl Mering | Northwest Conference Championships |
| 46.14 | Feb. 12, 2012 | Karl Mering | Northwest Conference Championships |
| 47.15 | Feb. 27, 2011 | James Nusse | Northwest Conference Championships |
| 47.20 | Feb. 14, 2010 | James Nusse | Northwest Conference Championships |
| 49.13 | Nov. 21, 2009 | James Nusse | Northwest Invitational |
| 49.49 | Nov. 15, 2008 | James Nusse | Pacific Lutheran @Whitman |
| 49.50 | Nov. 7, 2008 | James Nusse | Whitman @Linfield |
