| Time | Date | Name | Meet |
|---|---|---|---|
| 54.24 | Oct. 27, 2023 | Connor Daigle | Sewanee Invitational |
| 54.46 | Oct. 28, 2022 | Aleksei Kolesnikov | Sewanee Invitational |
| 54.65 | Oct. 29, 2021 | Connor Daigle | 20th Sewanee Invitational |
| 55.86 | Nov. 9, 2020 | Connor Daigle | Depauw-Wabash Virtual Invite |
| 56.35 | Oct. 28, 2020 | Connor Daigle | CSCAA Virtual Cup - Round 3 |
| 58.01 | Oct. 25, 2019 | Kyle Smithers | Sewanee Invitational |
