| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Freestyle | 55.50 | 2026 Eastern Ontario Regional Championship - Winte | 2026-01-30 |
| 100m IM | 1:08.16 | ROCS Red-Black Duel | 2025-11-22 |
| 200m Backstroke | 2:22.23 | 2025 NKB Fall Invitational | 2025-10-17 |
| 200m Breaststroke | 2:56.79 | 2025 NKB Fall Invitational | 2025-10-17 |
| 200m Freestyle | 2:01.22 | 2025 NKB Fall Invitational | 2025-10-17 |
| 200m IM | 2:29.46 | Cornwall Snowflake Meet 2025 | 2025-11-07 |
| 400m Freestyle | 4:24.15 | 2026 Eastern Ontario Regional Championship - Winte | 2026-01-30 |
| 400m IM | 5:07.94 | 2025 NKB Fall Invitational | 2025-10-17 |
| 50m Backstroke | 31.72 | Cornwall Snowflake Meet 2025 | 2025-11-07 |
| 50m Breaststroke | 37.03 | 2026 Eastern Ontario Regional Championship - Winte | 2026-01-30 |
| 50m Butterfly | 29.67 | Cornwall Snowflake Meet 2025 | 2025-11-07 |
| 50m Freestyle | 25.74 | 2026 Eastern Ontario Regional Championship - Winte | 2026-01-30 |
| 800m Freestyle | 9:09.46 | 2026 Eastern Ontario Regional Championship - Winte | 2026-01-30 |
Do, Alexander's top personal bests include 100m Freestyle (55.50), 100m IM (1:08.16), 200m Backstroke (2:22.23), 200m Breaststroke (2:56.79), 200m Freestyle (2:01.22).
Do, Alexander swims for ROC Swimming.
Do, Alexander has competed in 7 meets.