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USA Swimming Zone Teams
| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 52.91 | Feb. 22, 2019 | Ben Cono | North Baltimore Aquatic Club | Maryland Swimming Senior Short Course Championships |
| 52.98 | Dec. 14, 2018 | Ben Cono | North Baltimore Aquatic Club | MD NBAC 44th Annual Christmas invitational |
| 54.19 | Nov. 20, 2014 | Conor Dwyer | North Baltimore Aquatic Club | Arena Grand Prix - Minneapolis |
| 54.25 | Jan. 18, 2010 | Michael Phelps | North Baltimore Aquatic Club | Toyota Grand Prix |
| 57.96 | March 27, 2009 | Colin Stang | Retriever Aquatic Club | PV Speedo Champions Serie |
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