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| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 43.14 | Nov. 20, 2021 | Igor Bretas | Carson-Newman University | Tennessee Invitational |
| 44.80 | Nov. 5, 2021 | Igor Bretas | Carson-Newman University | Emory Invitational |
| 44.98 | Oct. 10, 2021 | Viacheslav Ohnov | Wingate University | UIndy Invite |
| 45.68 | Oct. 2, 2021 | Igor Dantas | Carson-Newman University | King Early Season Invite |
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