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| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 46.55 | April 5, 2024 | Sam Lorenz | Schroeder YMCA Swim Team | YMCA National Championships (SCY) |
| 46.63 | Dec. 4, 2009 | Adam Mania | Schroeder YMCA Swim Team | AT&T Short Course National Championships |
| 47.37 | March 3, 2007 | Adam Mania | Schroeder YMCA Swim Team | WI LSC Senior Short Course Championships |
| 48.15 | March 13, 2003 | Kyle Bubolz | Waukesha Express Swim Team | Speedo Champions Series - Minneapolis |
| 49.86 | Dec. 13, 2001 | Garrett Weber-Gale | Schroeder YMCA Swim Team | OK Kerr-McGee Elite Pro-Am Short Course Meet |
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