| Time | Date | Name | Meet |
|---|---|---|---|
| 48.08 | Nov. 17, 2018 | Gabriel Lee | CSU Magnus Cup Invitational |
| 48.25 | March 10, 2016 | Justin Kiedrzyn | NCAA Division II Championships |
| 49.44 | Jan. 30, 2016 | Justin Kiedrzyn | Seattle vs. Simon Fraser |
| 49.83 | March 4, 2011 | Greg Laughlin | NAIA National Championships |
| 49.94 | March 5, 2010 | Niels Muntzenburger | NAIA National Championships |
