| Name | Time | Date | Meet |
|---|---|---|---|
| Shawn Lucchesi | 46.93 | Feb. 15, 2015 | 2015 Midwest Conference Championships |
| Shawn Lucchesi | 47.94 | Jan. 31, 2015 | Wisconsin Private College Championships |
| Shawn Lucchesi | 47.99 | Dec. 6, 2014 | Pioneer Classic |
| Alex Schneider | 48.52 | Feb. 16, 2014 | 2014 Midwest Conference Championships |
| Alex Schneider | 48.83 | Feb. 17, 2013 | 2013 Midwest Conference Championships |
| Dan Miller | 49.09 | Feb. 23, 2008 | Midwest Invitational Last Chance Meet |
| Clark Duffy | 52.76 | Jan. 31, 2004 | Wisconsin Private College Championships |
