| Name | Time | Date | Meet |
|---|---|---|---|
| Shaine Casas | 52.51 | July 8, 2022 | Speedo Sectionals - Austin |
| Austin Katz | 54.06 | July 28, 2018 | Phillips 66 Summer National Championships |
| Aaron Peirsol | 51.94 | July 8, 2009 | ConocoPhillips National Championships |
| Aaron Peirsol | 52.89 | June 30, 2008 | 2008 U.S. Olympic Team Trials |
| Aaron Peirsol | 53.17 | April 1, 2005 | 2005 World Championship Trials |
| Neil Walker | 56.16 | Feb. 10, 2004 | ConocoPhillips Spring National Championships |
| Matthew Ulrickson | 59.04 | June 2, 2000 | Texas Senior Circuit #2 |
