| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:08.68 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m Breaststroke | 1:23.05 | 2025 MSSAC Open | 2025-12-19 |
| 100m Butterfly | 1:08.88 | 2025 MSSAC Open | 2025-12-19 |
| 100m Freestyle | 1:00.31 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m IM | 1:11.15 | RHAC Fall Classic 2025 | 2025-10-24 |
| 1500m Freestyle | 1:59.24 | RHAC Distance Duel 2025 | 2025-11-13 |
| 200m Backstroke | 2:31.44 | 2025 RHAC Summer League | 2025-07-18 |
| 200m Freestyle | 2:11.80 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 200m IM | 2:30.68 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 400m Freestyle | 4:40.04 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 400m IM | 5:19.51 | RHAC Fall Classic 2025 | 2025-10-24 |
| 50m Backstroke | 31.52 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 50m Breaststroke | 38.57 | RHAC Fall Classic 2025 | 2025-10-24 |
| 50m Butterfly | 29.58 | 2025 MSSAC Open | 2025-12-19 |
| 50m Freestyle | 28.13 | 2025 Alex Baumann Invitational | 2025-11-21 |
| 800m Freestyle | 9:38.05 | 2025 Alex Baumann Invitational | 2025-11-21 |
Su, Joshua's top personal bests include 100m Backstroke (1:08.68), 100m Breaststroke (1:23.05), 100m Butterfly (1:08.88), 100m Freestyle (1:00.31), 100m IM (1:11.15).
Su, Joshua swims for The Richmond Hill Aquatic Club.
Su, Joshua has competed in 9 meets.