| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Breaststroke | 1:26.09 | June Performance Meet 2025 | 2025-06-06 |
| 100m Butterfly | 1:24.29 | June Performance Meet 2025 | 2025-06-06 |
| 100m Freestyle | 1:04.17 | June Performance Meet 2025 | 2025-06-06 |
| 200m IM | 2:47.81 | June Performance Meet 2025 | 2025-06-06 |
| 50m Backstroke | 33.61 | June Performance Meet 2025 | 2025-06-06 |
| 50m Breaststroke | 38.35 | June Performance Meet 2025 | 2025-06-06 |
| 50m Butterfly | 31.83 | June Performance Meet 2025 | 2025-06-06 |
| 50m Freestyle | 28.65 | June Performance Meet 2025 | 2025-06-06 |
Dai, Alexander's top personal bests include 100m Breaststroke (1:26.09), 100m Butterfly (1:24.29), 100m Freestyle (1:04.17), 200m IM (2:47.81), 50m Backstroke (33.61).
Dai, Alexander swims for The Richmond Hill Aquatic Club.
Dai, Alexander has competed in 1 meets.