| Time | Date | Name | Meet |
|---|---|---|---|
| 55.32 | March 3, 2023 | Nathan Wu | Speedo Sectionals - Carlsbad |
| 55.93 | March 5, 2022 | Keller Morgan | Speedo Sectionals - Carlsbad |
| 56.72 | Dec. 18, 2021 | Keller Morgan | Speedo Sectionals - Huntington Beach |
| 57.47 | Dec. 10, 2021 | Daniel Verdolaga | Speedo Winter Junior Championship West |
| 57.48 | Feb. 17, 2020 | Jacky Xing | CA RMDA Senior Invitational |
| 1:00.25 | Nov. 2, 2019 | Keller Morgan | CA RMDA Kevin Perry Senior Invitational |
| 1:00.68 | Dec. 8, 2017 | Addy Epp | CA GSC/SCS Winter Age Group Champs |
| 1:01.06 | Nov. 4, 2017 | Addy Epp | CA RMDA Kevin Perry Senior Invitational |
| 1:01.36 | Nov. 5, 2016 | Eric Forbes | CA RMDA Kevin Perry Senior Invitational |
