| Name | Time | Date | Meet |
|---|---|---|---|
| Patrick Mulcare | 50.43 | Sept. 29, 2017 | UCSB vs. USC, Washington State |
| Michael Domagala | 51.06 | Sept. 30, 2016 | Cal Poly vs. Southern California |
| Alex Lendrum | 52.48 | Nov. 12, 2010 | USC vs. UC-Santa Barbara - Second Meet |
| James Martin | 53.87 | Oct. 10, 2009 | Southern Cal Invitational |
