| Time | Date | Name | Meet |
|---|---|---|---|
| 53.32 | Aug. 3, 2022 | David Schmitt | Speedo Junior National Championships |
| 53.99 | July 28, 2022 | David Schmitt | Phillips 66 National Championships |
| 55.96 | June 17, 2022 | Daniel Verdolaga | CA BUEN June Age Group |
| 56.13 | May 28, 2022 | Daniel Verdolaga | CA NOVA Speedo Grand Challenge |
| 56.25 | April 16, 2022 | David Schmitt | CA RMDA La Mirada Armada LC Senior Me |
| 57.65 | Feb. 12, 2022 | David Schmitt | CA SET The Swim Team February Lc Senior Champs |
| 58.59 | May 29, 2021 | Keller Morgan | CA NOVA Speedo Grand Challenge |
| 59.80 | July 29, 2016 | Kaikea Wilinski | CA MVN Summer Junior Olympics |
| 1:06.17 | July 27, 2016 | Jake Redman | CA MVN Summer Junior Olympics |
| 1:10.65 | May 28, 2016 | Anders Aistars | CA NOVA Speedo Grand Challenge |
