| Time | Date | Name | Meet |
|---|---|---|---|
| 49.01 | Feb. 15, 2013 | Michael Brus | Midwest Conference Championships |
| 49.40 | March 23, 2012 | Michael Brus | NCAA Division III Championships |
| 50.20 | Feb. 17, 2012 | Michael Brus | Midwest Conference Championships |
| 50.28 | Feb. 18, 2011 | Michael Brus | Midwest Conference Championships |
| 53.68 | Dec. 4, 2010 | Michael Brus | Pioneer (Grinnell) Invitational |
| 53.69 | Nov. 13, 2010 | Michael Brus | Grinnell vs. Luther |
| 56.70 | Jan. 15, 2009 | Tommy Olson | Grinnell Invitational |
