| Time | Date | Name | Meet |
|---|---|---|---|
| 43.22 | March 14, 2019 | Caspar Corbeau | Speedo Champions Series - Federal Way |
| 43.78 | March 15, 2018 | Caspar Corbeau | Speedo Champions Series - Federal Way |
| 44.09 | March 16, 2017 | Evan Carlson | Speedo Champions Series - Western - Federal Way |
| 44.48 | March 26, 2015 | Patrick Mulcare | Speedo Champions Series - Austin |
| 44.72 | March 15, 2014 | Patrick Mulcare | Speedo Champions Series - Federal Way |
| 45.23 | March 10, 2010 | Steven Ung | Speedo Champions Series - Federal Way |
| 46.11 | Dec. 5, 2009 | Steven Ung | AT&T Short Course National Championships |
| 49.15 | March 6, 2003 | Matt Viglione | American Short Course Championships |
