| Name | Time | Date | Meet |
|---|---|---|---|
| Marcel Liu | 51.38 | Feb. 24, 2024 | SCIAC Championships |
| Andy Rothstein | 51.48 | Feb. 23, 2018 | SCIAC Championships |
| Henry Baer | 52.38 | Feb. 21, 2015 | 2015 SCIAC Championships |
| Peter Buhler | 54.05 | Feb. 21, 2011 | Southern California Intercollegiate Athletic Conference Championships |
| Peter Buhler | 54.17 | Feb. 22, 2010 | Southern California Intercollegiate Athletic Conference Championships |
| Peter Buhler | 57.66 | Jan. 9, 2010 | Redlands vs. Cal Tech |
