| Name | Time | Date | Meet |
|---|---|---|---|
| Tommy Cope | 54.42 | March 16, 2016 | NCSA Spring Junior National Championship |
| Tommy Cope | 54.74 | March 18, 2015 | NCSA Spring Junior National Championship |
| Jack Pohlmann | 56.11 | March 16, 2011 | NASA Junior National Championship |
| Jack Pohlmann | 57.66 | March 17, 2010 | NSCA Junior Nationals |
| Andy Bergren | 58.27 | March 22, 2004 | NCSA Junior National Championships |
| Andy Bergren | 58.50 | April 7, 2003 | 2003 NCSA Junior National Championships |
| Jonathan Buchanan | 1:00.80 | March 20, 2003 | Speedo Champions Series - Oxford |
