| Name | Time | Date | Meet |
|---|---|---|---|
| Michael Petrides | 50.76 | July 31, 2019 | Phillips 66 Summer National Championships |
| Michael Petrides | 51.18 | July 25, 2018 | Phillips 66 Summer National Championships |
| Kevin Frifeldt | 51.65 | June 18, 2016 | 2016 HI Senior LC Championship |
| Ryan Stack | 51.87 | Aug. 6, 2013 | USA Swimming Junior National Championships |
| Ryan Stack | 53.28 | June 15, 2013 | 2013 HI Senior LCM Championships |
| Ben Komer | 53.89 | Dec. 4, 2003 | 2003 U.S. Open Swimming Championship |
| Yusuke Kobayashi | 1:03.59 | June 30, 2002 | 2002 PC WV LCM JR T&F |
