| Time | Date | Name | Meet |
|---|---|---|---|
| 47.72 | Feb. 14, 2020 | Matthew Mays | Metro Atlantic Athletic Conference Championships |
| 48.91 | Feb. 15, 2019 | Matthew Mays | Metro Atlantic Athletic Conference Championships |
| 49.36 | Feb. 16, 2018 | Matthew Mays | Metro Atlantic Athletic Conference Championships |
| 49.47 | Feb. 10, 2017 | Colin Curtin | Metro Atlantic Athletic Conference Championships |
| 49.72 | Feb. 12, 2016 | Colin Curtin | Metro Atlantic Athletic Conference Championships |
| 51.40 | Nov. 20, 2015 | Colin Curtin | Harold Anderson Invitational |
| 51.88 | Feb. 15, 2013 | Cameron Hessler | Metro Atlantic Athletic Conference Championships |
| 51.99 | Feb. 24, 2012 | Cameron Hessler | Eastern College Athletic Conference Championships |
| 52.87 | Feb. 25, 2011 | Cameron Hessler | Eastern College Athletic Conference Championships |
| 52.89 | Feb. 27, 2010 | Kevin McDonald | ECAC Championships |
| 53.81 | Feb. 27, 2009 | Tom Ferrigno | ECAC Open Swimming & Divi |
