| Time | Date | Name | Meet |
|---|---|---|---|
| 54.48 | March 20, 2009 | Nelson Westby | NCAA Division III Championships |
| 54.50 | March 21, 2008 | Nelson Westby | NCAA Division III Mens Championship |
| 56.26 | March 16, 2007 | Nelson Westby | NCAA Division III Mens Championships |
| 56.42 | March 17, 2006 | Nelson Westby | NCAA Division III Mens Championships |
| 57.23 | Dec. 2, 2005 | Nelson Westby | CollegeSwimming.com Classic |
| 59.26 | Nov. 19, 2005 | Nelson Westby | Minnesota Invitational |
