| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:26.81 | PSW June Jamboree 2025 | 2025-06-07 |
| 100m Breaststroke | 1:37.52 | SKSC Summerfest 2025 | 2025-07-26 |
| 100m Butterfly | 1:29.77 | SKSC Summerfest 2025 | 2025-07-26 |
| 100m Freestyle | 1:10.00 | SKSC Summerfest 2025 | 2025-07-26 |
| 100m IM | 1:23.89 | SKSC Summerfest 2025 | 2025-07-26 |
| 200m Freestyle | 2:38.14 | PSW June Jamboree 2025 | 2025-06-07 |
| 200m IM | 3:03.27 | PSW June Jamboree 2025 | 2025-06-07 |
| 50m Backstroke | 38.20 | PSW June Jamboree 2025 | 2025-06-07 |
| 50m Breaststroke | 43.92 | SKSC Summerfest 2025 | 2025-07-26 |
| 50m Butterfly | 39.36 | SKSC Summerfest 2025 | 2025-07-26 |
Chen, Leon's top personal bests include 100m Backstroke (1:26.81), 100m Breaststroke (1:37.52), 100m Butterfly (1:29.77), 100m Freestyle (1:10.00), 100m IM (1:23.89).
Chen, Leon swims for Surrey Knights Swim Club.
Chen, Leon has competed in 2 meets.