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USA Swimming Zone Teams
| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 43.84 | Dec. 2, 2016 | Tom Shields | California Aquatics | AT&T Winter Championships |
| 44.88 | Nov. 30, 2012 | Tom Shields | California Aquatics | USA Swimming Winter Nationals |
| 47.12 | March 2, 2012 | ERICH PESKE | DeAnza Cupertino Aquatics | ST TXLA American SC Championships |
| 47.81 | Jan. 18, 2010 | William Copeland | California Aquatics | Toyota Grand Prix |
| 48.41 | Jan. 19, 2009 | William Copeland | California Aquatics | Toyota Grand Prix |
| 49.53 | March 11, 2004 | Erik Scalise | Reno Aquatic Club | Speedo CA-NV Spring Sectionals |
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