| Name | Time | Date | Meet |
|---|---|---|---|
| Jonathan Dunnett | 53.16 | Feb. 3, 2018 | Tech Sprints |
| Ross Johnston | 54.17 | Feb. 4, 2017 | Cougar Invitational |
| Ross Johnston | 55.20 | Nov. 9, 2016 | Bridgewater State vs. Wheaton-MA |
| Ross Johnston | 55.59 | Oct. 17, 2015 | Wheaton (MA) vs. Brandeis |
| Ross Johnston | 55.74 | Jan. 7, 2014 | Pomona vs. Wheaton (MA) |
| Zachary Fichman-Klein | 57.60 | Jan. 29, 2011 | Tufts vs. Wheaton |
