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YMCA
| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 25.28 | Jan. 12, 2023 | Daniel Diehl | Cumberland MD YMCA | TYR Pro Swim Series - Knoxville |
| 25.32 | July 21, 2022 | Daniel Diehl | Cumberland MD YMCA | YMCA Long Course National Championships |
| 25.63 | April 28, 2022 | Joseph Hayburn | Annapolis Swim Club | Phillips 66 International Team Trials |
| 26.14 | June 19, 2015 | Mohamed Hussein | Retriever Aquatic Club | Arena Pro Swim Series |
| 26.99 | March 27, 2015 | Coleman Stewart | North Baltimore Aquatic Club | Speedo Champions Series - Indianapolis |
| 27.20 | March 21, 2015 | Brad Shannon | Chesapeake Bay Aquatic Club | NCSA Spring Junior National Championship |
| 27.96 | March 15, 2008 | Greg Pelton | North Baltimore Aquatic Club | Speedo Champions Series - College Park |
| 28.83 | Aug. 7, 2006 | Kevin Marsteller | North Baltimore Aquatic Club | USA Swimming Junior National Championships |
| 29.75 | Aug. 10, 2005 | Austin Surhoff | Maryland | Eastern Zone Age Group Long Course Championships |
| 30.40 | July 30, 2004 | Matthew Harmon | Cumberland MD YMCA | YMCA National Long Course Championships |
| 31.71 | July 28, 2003 | Jason Amos | Carroll County YMCA (MD) | YMCA National Long Course Championships |