| Time | Date | Name | Meet |
|---|---|---|---|
| 58.07 | July 22, 2023 | Aiden Yeo | CA SCS/RAA Summer A/G Championships |
| 59.74 | April 16, 2023 | Aiden Yeo | CA MVN Fran Crippen SMOC |
| 1:01.37 | July 10, 2022 | Daniel Fu | CA NOVA Southern California Invitational |
| 1:02.60 | June 17, 2022 | Daniel Fu | CA BUEN June Age Group |
| 1:02.87 | April 17, 2021 | Lucas McKee | CA MVN APRIL MVN |
| 1:03.05 | July 26, 2019 | Jerald Bermudez | CA MVN Summer Junior Olympics |
| 1:03.20 | June 14, 2019 | Jerald Bermudez | CA BUEN SCS June Age Group Champs |
| 1:03.32 | July 28, 2017 | Jake Redman | Southern California Swimming Summer Junior Olympics |
| 1:03.84 | July 29, 2016 | Jack Trujillo | CA MVN Summer Junior Olympics |
| 1:16.71 | July 27, 2016 | Jack Lawson | CA MVN Summer Junior Olympics |
