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| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 50.94 | March 17, 2017 | Andrew Wilson | Emory University | NCAA Division III Championships |
| 51.10 | Feb. 16, 2011 | Joel Knuesel | University of Wisconsin-LaCrosse | Wisconsin Intercollegiate Athletic Conference Championships |
| 54.48 | March 20, 2009 | Nelson Westby | St Olaf College | NCAA Division III Championships |
| 54.50 | March 21, 2008 | Nelson Westby | St Olaf College | NCAA Division III Mens Championship |
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