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USA Swimming Zone Teams
| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 49.97 | May 20, 2023 | Alex KHNYKIN | Springfield Aquatics (MO) | EKC May Mayhem LCM Meet |
| 50.09 | May 13, 2021 | Alex KHNYKIN | Springfield Aquatics (MO) | IN TYR Pro Swim Series - Indianapolis |
| 51.09 | May 1, 2021 | Alex KHNYKIN | Springfield Aquatics (MO) | AR HAWG AquaHawgs LC Opener |
| 51.34 | May 15, 2016 | Rodrigo Caceres | Springfield Aquatics (MO) | Arena Pro Swim Series - Charlotte |
| 51.67 | March 3, 2016 | Sean Feher | Springfield Aquatics (MO) | Speedo Champions Series - Jenks |
| 52.00 | June 29, 2001 | Kicker Vencill | Arkansas Dolphins | Senior Circuit #3 |
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