| Time | Date | Name | Meet |
|---|---|---|---|
| 46.99 | March 18, 2022 | Nicolas Tekieli | NCAA Division III Championship |
| 47.19 | March 17, 2022 | Nicolas Tekieli | NCAA Division III Championship |
| 47.57 | March 18, 2016 | Matthew Williams | NCAA Division III Championships |
| 47.94 | Feb. 22, 2014 | Matthew Williams | SCIAC Championships |
| 48.27 | Feb. 21, 2014 | Matthew Williams | SCIAC Championships |
| 49.54 | Feb. 8, 2014 | Matthew Williams | Pomona vs. C-M-S |
| 49.86 | Dec. 7, 2013 | Matthew Williams | Chapman vs. C-M-S, Whittier |
| 50.59 | Feb. 18, 2013 | Blake Weber | SCIAC Championships |
| 50.95 | Feb. 17, 2013 | Blake Weber | SCIAC Championships |
| 51.01 | March 24, 2011 | Blake Weber | NCAA Division III Championships |
| 51.29 | Feb. 21, 2011 | Blake Weber | Southern California Intercollegiate Athletic Conference Championships |
| 51.36 | Feb. 22, 2010 | Austin Hallett | Southern California Intercollegiate Athletic Conference Championships |
| 52.17 | Feb. 21, 2010 | Blake Weber | Southern California Intercollegiate Athletic Conference Championships |
| 52.31 | March 20, 2009 | Nick Ostreim | NCAA Division III Championships |
| 52.65 | March 21, 2008 | Nick Ostreim | NCAA Division III Mens Championship |
