| Name | Time | Date | Meet |
|---|---|---|---|
| Cody Bybee | 4:20.16 | Dec. 7, 2017 | Speedo Winter Junior Championships - East |
| JK Koehler | 4:20.20 | Dec. 3, 2009 | AT&T Short Course National Championships |
| JK Koehler | 4:25.54 | March 22, 2004 | NCSA Junior National Championships |
| JK Koehler | 4:26.08 | April 7, 2003 | 2003 NCSA Junior National Championships |
| Zachary Freed | 4:48.54 | March 20, 2003 | Speedo Champions Series - Oxford |
