| Time | Date | Name | Meet |
|---|---|---|---|
| 4:27.11 | Feb. 29, 2024 | Danielis Kvederis | Western Athletic Conference Championships |
| 4:29.43 | Dec. 17, 2023 | Danielis Kvederis | UNLV Invitational |
| 4:30.84 | Feb. 21, 2013 | Murray Longbotham | - |
| 4:30.84 | Feb. 21, 2013 | John Longbotham | Mountain Pacific Sports Federation Championships |
| 4:31.14 | Feb. 16, 2012 | John Longbotham | Mountain Pacific Sports Federation Championships |
| 4:32.16 | Feb. 24, 2011 | John Longbotham | Mountain Pacific Sports Federation Championships |
| 4:34.83 | Feb. 10, 2010 | John Longbotham | Pacific Collegiate Swim Conference Championships |
| 4:35.25 | March 16, 2007 | Gordon Smith | NCAA Division II Championships |
| 4:48.18 | March 10, 2006 | Nathan Freeman | NCAA Division II Championships |
