| Name | Time | Date | Meet |
|---|---|---|---|
| Roman Rybin | 50.91 | July 28, 2018 | Pacific Northwest LCM Senior Championships |
| David Bai | 51.25 | Aug. 5, 2009 | 2009 U. S. Open |
| Ivan Perhat | 52.29 | Aug. 1, 2007 | 2007 ConocoPhillips USA Swimming Championships |
| Matt Diotte | 52.92 | April 1, 2005 | 2005 World Championship Trials |
| Matt Diotte | 53.37 | Aug. 3, 2004 | 2004 ConocoPhillips National Championships |
| Matt Diotte | 53.85 | June 10, 2004 | 2004 Janet Evans Invitational |
| D'voreaux Cann | 1:15.82 | Aug. 3, 2002 | 2002 PC TERA LCM Far West Championships |
