| Time | Date | Name | Meet |
|---|---|---|---|
| 48.44 | Feb. 16, 2024 | Ian Horstkamp-Vinekar | America East Conference Championships |
| 48.52 | Feb. 12, 2022 | Ian Horstkamp-Vinekar | America East Conference Championships |
| 49.11 | Nov. 20, 2021 | Edward Madrigal | BUCKNELL INVITATIONAL |
| 49.73 | April 24, 2021 | Edward Madrigal | America East Championship |
| 50.33 | Feb. 21, 2020 | Edward Madrigal | Coastal Collegiate Sports Association Championships |
| 51.44 | Feb. 19, 2016 | Christian Giglio | Coastal Collegiate Swimming Association Championships |
| 51.57 | Dec. 5, 2015 | Scott Quirie | ECAC Winter Championships |
| 52.07 | Feb. 20, 2015 | Christian Giglio | Coastal Collegiate Swimming Association Championships |
| 52.49 | Dec. 6, 2014 | Scott Quirie | ECAC Winter Championships |
| 53.18 | Nov. 16, 2014 | Scott Quirie | NJIT vs. Bryant |
| 53.25 | Nov. 1, 2014 | Scott Quirie | NJIT vs. Manhattan, Saint Francis (NY) |
| 53.68 | Oct. 18, 2014 | Scott Quirie | UMBC vs. Gardner-Webb, NJIT, Virginia Military Institute |
| 54.49 | Oct. 7, 2014 | Scott Quirie | NJIT vs. Saint Peters |
| 55.25 | Feb. 21, 2014 | Anthony Czar | Coastal Collegiate Swimming Association Championships |
| 55.55 | Nov. 15, 2013 | Anthony Czar | NJIT vs. St. Peters |
| 56.51 | Nov. 2, 2013 | Anthony Czar | Lehigh vs. Colgate, NJIT |
| 57.10 | Feb. 16, 2013 | John Stefan | Metropolitan Championships |
| 57.33 | Feb. 15, 2013 | John Stefan | Metropolitan Championships |
| 58.12 | Nov. 17, 2012 | Brian Capozzola | Ramapo vs. NJIT, Pace |
| 58.84 | Feb. 18, 2012 | John Stefan | Metropolitan Championships |
| 1:00.03 | Feb. 17, 2012 | John Stefan | Metropolitan Championships |
| 1:03.42 | Jan. 17, 2010 | Richard Montesano | Canisius vs. Bryant, Siena College, NJIT |
