| Rank | Athlete | Class | Mark | Meet | Date |
|---|---|---|---|---|---|
| 1 |
|
1:00.28 | 2025 Cloverleaf Early Bird Relays | Mar 29, 2025 | |
| 2 |
|
1:01.34 | 2015 Orange Relays | May 1, 2015 | |
| 3 |
|
1:02.21 | 2016 Orange Relays | Apr 29, 2016 | |
| 4 |
|
1:03.57 | 2024 Cloverleaf Early Bird Relays | Mar 23, 2024 | |
| 5 |
|
1:04.65 | 2017 Orange Relays | Apr 28, 2017 | |
| 6 |
|
1:04.80 | 2019 Orange Relays | Apr 26, 2019 | |
| 7 |
|
1:05.88 | 2022 Cloverleaf Early Bird Relays | Mar 26, 2022 |