| Name | Time | Date | Meet |
|---|---|---|---|
| Michael Petrides | 49.22 | March 24, 2019 | Speedo Champions Series - Phoenix |
| Michael Petrides | 49.32 | March 1, 2018 | ST TXLA American Short Course Championships |
| Daren Choi | 49.86 | March 10, 2010 | Speedo Champions Series - Federal Way |
| Daren Choi | 50.97 | Dec. 4, 2009 | AT&T Short Course National Championships |
