| Time | Date | Name | Meet |
|---|---|---|---|
| 49.62 | Feb. 20, 2009 | Mike Kozak | CCIW Championships |
| 50.52 | March 21, 2008 | Mike Kozak | NCAA Division III Mens Championship |
| 50.62 | Feb. 12, 2005 | Justin Gorson | CCIW Championships |
| 51.00 | Feb. 11, 2005 | Justin Gorson | CCIW Championships |
| 52.59 | Feb. 14, 2003 | Marcus Meyer | CCIW Swimming Championships |
| 54.66 | Feb. 15, 2002 | Russ Blogg | CCIW Championships |
