| Name | Time | Date | Meet |
|---|---|---|---|
| Max Oberg | 45.17 | Feb. 19, 2022 | SCIAC Championships |
| Naci Keskin | 45.67 | Nov. 21, 2021 | Caltech Invite |
| Henry Baer | 45.94 | Feb. 22, 2015 | 2015 SCIAC Championships |
| Henry Baer | 48.03 | Dec. 14, 2014 | California Collegiate Invitational |
| Patric Eck | 48.45 | Feb. 23, 2014 | 2014 SCIAC Championships |
| Patric Eck | 49.36 | Feb. 8, 2014 | Cal Tech vs. La Verne |
| Peter Buhler | 49.45 | Feb. 23, 2010 | Southern California Intercollegiate Athletic Conference Championships |
| Jack Blackwood | 53.38 | Jan. 9, 2010 | Redlands vs. Cal Tech |
