| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:15.56 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Breaststroke | 1:25.32 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Butterfly | 1:07.36 | Toronto Grand Prix | 2026-01-24 |
| 100m Butterfly | 1:04.40 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Freestyle | 1:03.04 | Toronto Grand Prix | 2026-01-24 |
| 100m Freestyle | 58.33 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 100m IM | 1:15.37 | 2025 Downtown Sprint Meet | 2025-10-25 |
| 200m Butterfly | 2:49.73 | June Performance Meet 2025 | 2025-06-06 |
| 200m Butterfly | 2:33.75 | 2025 MSSAC Open | 2025-12-19 |
| 200m Freestyle | 2:22.99 | 2025 Central Region Div 2 LC Championships | 2025-06-13 |
| 200m Freestyle | 2:11.91 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 200m IM | 2:55.19 | June Performance Meet 2025 | 2025-06-06 |
| 200m IM | 2:38.31 | Gus Ryder Memorial Cup 2025 | 2025-11-07 |
| 400m Freestyle | 4:47.40 | 2025 MSSAC Open | 2025-12-19 |
| 50m Breaststroke | 35.52 | OUA & Club Winter Invitational | 2026-01-17 |
| 50m Butterfly | 30.62 | Toronto Grand Prix | 2026-01-24 |
| 50m Butterfly | 28.92 | Border City Invitational 2025 | 2025-12-05 |
| 50m Freestyle | 28.54 | 2025 Central Region Div 2 LC Championships | 2025-06-13 |
| 50m Freestyle | 26.59 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
Tsilavis, Jason's top personal bests include 100m Backstroke (1:15.56), 100m Breaststroke (1:25.32), 100m Butterfly (1:07.36), 100m Butterfly (1:04.40), 100m Freestyle (1:03.04).
Tsilavis, Jason swims for Toronto Swim Club.
Tsilavis, Jason has competed in 11 meets.