| Time | Date | Name | Meet |
|---|---|---|---|
| 52.69 | Nov. 3, 2023 | John Key | Chicago D3 Shootout |
| 53.08 | Jan. 6, 2023 | Michael Kohl | Occidental vs. Trinity (TX) |
| 54.35 | Oct. 8, 2022 | John Key | Trinity University (Texas) intrasquad |
| 54.66 | Nov. 21, 2021 | Kendal Southwell | Tiger Invitational |
| 55.07 | Nov. 10, 2018 | Jamie Warren | Texas Christian vs. Trinity (TX) |
| 55.30 | Oct. 24, 2015 | Jon Hoffman | Trinity (TX) vs. Mc Murry |
