| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:08.83 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Breaststroke | 1:10.81 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 100m Butterfly | 1:08.17 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Freestyle | 56.97 | 2025 Alex Baumann Invitational | 2025-11-21 |
| 200m Backstroke | 2:29.51 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 200m Breaststroke | 2:37.23 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m Freestyle | 2:05.98 | SCAR Cindy Nicholas Memorial Meet | 2025-11-01 |
| 200m IM | 2:22.47 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 400m Freestyle | 4:33.56 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 400m IM | 5:13.23 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 50m Backstroke | 32.64 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 50m Breaststroke | 32.60 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 50m Butterfly | 29.25 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 50m Freestyle | 26.23 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
Jachymek, Gregory's top personal bests include 100m Backstroke (1:08.83), 100m Breaststroke (1:10.81), 100m Butterfly (1:08.17), 100m Freestyle (56.97), 200m Backstroke (2:29.51).
Jachymek, Gregory swims for Scarborough Swim Club.
Jachymek, Gregory has competed in 9 meets.