| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Butterfly | 1:13.03 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Freestyle | 1:03.73 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 200m Butterfly | 3:01.79 | COBRA 2026 Stephen Clarke Classic | 2026-01-10 |
| 200m Freestyle | 2:21.50 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 200m IM | 2:46.48 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 400m Freestyle | 5:01.23 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 400m IM | 6:08.88 | 2025 NYAC Cup | 2025-11-14 |
| 50m Backstroke | 35.46 | 2025 NYAC Cup | 2025-11-14 |
| 50m Breaststroke | 41.56 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 50m Butterfly | 31.90 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 50m Freestyle | 29.51 | 2025 Murray Drudge Invitational | 2025-12-05 |
Lee, Sebastian's top personal bests include 100m Butterfly (1:13.03), 100m Freestyle (1:03.73), 200m Butterfly (3:01.79), 200m Freestyle (2:21.50), 200m IM (2:46.48).
Lee, Sebastian swims for North York Aquatic Club.
Lee, Sebastian has competed in 8 meets.