| Time | Date | Name | Meet |
|---|---|---|---|
| 50.87 | March 29, 2024 | Ron Polonsky | NCAA Division I Mens Championships |
| 51.14 | March 24, 2023 | Ron Polonsky | NCAA Division I Mens Championships |
| 51.75 | Nov. 12, 2008 | John Criste | California @Stanford |
| 52.03 | March 28, 2008 | Paul Kornfeld | NCAA Division I Mens Championships |
| 52.19 | March 15, 2007 | Paul Kornfeld | NCAA Division I Mens Championships |
| 52.55 | March 2, 2005 | Gary Marshall | Men's Pac-10 Championsihps |
