| Name | Time | Date | Meet |
|---|---|---|---|
| Joseph Schooling | 46.70 | Dec. 7, 2012 | Speedo Winter Junior National Championships |
| Joseph Schooling | 47.06 | Dec. 9, 2011 | Speedo Junior National Championships |
| Joseph Schooling | 48.81 | Dec. 10, 2010 | Speedo Winter Junior Championships - East |
| Shaune Fraser | 50.26 | Dec. 3, 2004 | 2004 FL Gator Holiday Classic |
| Tuck Kar Wong | 50.77 | Dec. 6, 2002 | FL GSC Gator Speedo Holiday Classic |
| Tuck Kar Wong | 51.39 | Nov. 8, 2002 | 2002 FL Bolles School Sharks SC Invita |
| Tim Jones | 53.18 | Dec. 7, 2001 | FL YTO Holiday Invitational |
