| Name | Time | Date | Meet |
|---|---|---|---|
| Evan Petty | 55.19 | July 14, 2023 | Southeastern LC Championships |
| Hayes Johnson | 56.01 | June 26, 2012 | USA Olympic Team Trials |
| Andrew Mitchell | 55.84 | Aug. 7, 2009 | 2009 U. S. Open |
| Alan Maher | 56.47 | July 8, 2009 | ConocoPhillips National Championships |
| Michael Gilliam | 56.78 | Feb. 10, 2004 | ConocoPhillips Spring National Championships |
| Christopher Kellam | 58.64 | July 9, 2003 | 2003 Speedo Champions Series - Fort Lauderdale |
