| Time | Date | Name | Meet |
|---|---|---|---|
| 49.42 | March 6, 2015 | Nathan Lethbridge | NAIA Championships |
| 49.89 | Dec. 6, 2014 | Nathan Lethbridge | Union College Winter Invitaional |
| 50.79 | March 1, 2013 | Travis Strachan | NAIA Championships |
| 51.57 | Dec. 1, 2012 | Travis Strachan | Union Invite |
| 51.85 | March 2, 2012 | Travis Strachan | NAIA Championships |
| 52.97 | Feb. 4, 2012 | Travis Strachan | Union (KY) vs. King (KY), Sewanee |
| 53.56 | Jan. 21, 2012 | Travis Strachan | Union (KY) vs. Bethel, Milligan |
| 54.27 | March 4, 2011 | Roberto Bertholo | NAIA National Championships |
| 54.49 | Feb. 18, 2011 | Roberto Bertholo | Appalachian Swimming Conference |
| 55.43 | Dec. 3, 2010 | David Johnson | Asbury Invitational |
| 55.80 | March 5, 2010 | Roberto Bertholo | NAIA National Championships |
