| Name | Time | Date | Meet |
|---|---|---|---|
| Charlie Hall | 51.81 | Feb. 26, 2016 | 2016 Kentucky State Championships |
| Charlie Hall | 51.91 | Feb. 11, 2016 | 2016 Kentucky Region Two Championships |
| Charlie Hall | 52.71 | Feb. 10, 2015 | 2015 Kentucky Region One Championships |
| MICHAEL POLIO | 53.62 | Feb. 24, 2012 | 2011-12 Kentucky Boys & Girls Championships |
