| Time | Date | Name | Meet |
|---|---|---|---|
| 46.45 | March 18, 2022 | Jack Wadsworth | NCAA Division III Championship |
| 47.34 | Feb. 18, 2022 | Jack Wadsworth | Liberty League Championships |
| 48.14 | Dec. 4, 2021 | Jack Wadsworth | Ithaca College Bomber Invitational |
| 50.29 | Oct. 30, 2021 | Jack Wadsworth | Rensselaer vs. Ithaca |
| 50.42 | Feb. 21, 2014 | Connor White | UNYSCSA/Empire 8 Championships |
| 50.78 | Feb. 20, 2014 | Connor White | UNYSCSA/Empire 8 Championships |
| 50.92 | Feb. 22, 2013 | Connor White | UNYSCSA/Empire 8 Championships |
| 51.02 | Feb. 21, 2013 | Connor White | UNYSCSA/Empire 8 Championships |
| 51.34 | Feb. 25, 2011 | Connor White | Empire 8 / UNYSCSA Championships |
| 51.38 | Feb. 24, 2011 | Connor White | Empire 8 / UNYSCSA Championships |
| 52.31 | Feb. 26, 2010 | Jeff Rapp | Upper New York State Collegiate Swimming Association Championships |
| 54.77 | Dec. 6, 2009 | Jeff Rapp | Don Richards Invitational |
| 54.81 | Dec. 5, 2009 | Jeff Rapp | Don Richards Invitational |
| 55.41 | Nov. 21, 2009 | Jeff Rapp | Hamilton vs. SUNY-Geneseo, Ithaca , Hartwick |
