| Name | Time | Date | Meet |
|---|---|---|---|
| Stephan Koenigsberger | 55.08 | March 20, 2015 | 2015 NCAA Division III Championships |
| Stephan Koenigsberger | 55.36 | Feb. 21, 2015 | 2015 NESCAC Men's Championships |
| Stephan Koenigsberger | 57.28 | Feb. 22, 2014 | 2014 NESCAC Men's Championships |
| Stephan Koenigsberger | 57.69 | Feb. 23, 2013 | 2013 New England Small College Athletic Conference Mens Championships |
| Matt Vukich | 58.51 | Feb. 26, 2011 | New England Small College Athletic Conference Mens Championships |
| Matt Vukich | 59.29 | Feb. 27, 2010 | New England Small College Athletic Conference (M) Championships |
| Peter Swanson | 1:02.90 | Dec. 6, 2008 | Amherst @Middlebury |
