| Time | Date | Name | Meet |
|---|---|---|---|
| 44.10 | Feb. 17, 2024 | Conner Lofstrom | America East Conference Championships |
| 44.40 | Feb. 26, 2022 | Conner Lofstrom | Northeast Conference Championships |
| 44.95 | Feb. 17, 2018 | Benji Schulte | Metro Atlantic Athletic Conference Championships |
| 45.00 | Feb. 13, 2016 | Benji Schulte | Metro Atlantic Athletic Conference Championships |
| 45.29 | Feb. 27, 2011 | Alex Kosenski | Eastern College Athletic Conference Championships |
| 46.60 | Feb. 28, 2010 | Alex Kosenski | ECAC Championships |
| 47.88 | March 1, 2009 | Tom Ferrigno | ECAC Open Swimming & Divi |
