| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:04.81 | June Performance Meet 2025 | 2025-06-06 |
| 100m Backstroke | 1:01.04 | Western Region Short Course Championships | 2026-02-12 |
| 100m Breaststroke | 1:08.82 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 100m Breaststroke | 1:08.00 | Western Region Short Course Championships | 2026-02-12 |
| 100m Butterfly | 1:06.75 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 100m Butterfly | 1:02.47 | BAC Team Showdown 2025 | 2025-12-12 |
| 100m Freestyle | 1:00.92 | June Performance Meet 2025 | 2025-06-06 |
| 100m Freestyle | 56.33 | Western Region Short Course Championships | 2026-02-12 |
| 100m IM | 1:03.09 | 2025 MMST Dash 4 Cash | 2025-10-18 |
| 200m Backstroke | 2:11.12 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 200m Backstroke | 2:08.72 | BAC Team Showdown 2025 | 2025-12-12 |
| 200m Breaststroke | 2:28.60 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 200m Breaststroke | 2:24.91 | 2025 NYAC Cup | 2025-11-14 |
| 200m Butterfly | 2:27.81 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 200m Butterfly | 2:17.87 | Dean Boles Invitational Meet | 2026-01-10 |
| 200m Freestyle | 2:06.50 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 200m Freestyle | 2:04.06 | 2025 NYAC Cup | 2025-11-14 |
| 200m IM | 2:12.10 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 200m IM | 2:12.31 | Western Region Short Course Championships | 2026-02-12 |
| 400m Freestyle | 4:29.60 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 400m Freestyle | 4:16.37 | BAC Team Showdown 2025 | 2025-12-12 |
| 400m IM | 4:46.07 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 400m IM | 4:43.46 | Western Region Short Course Championships | 2026-02-12 |
| 50m Backstroke | 30.69 | June Performance Meet 2025 | 2025-06-06 |
| 50m Backstroke | 29.04 | Western Region Short Course Championships | 2026-02-12 |
| 50m Breaststroke | 33.67 | June Performance Meet 2025 | 2025-06-06 |
| 50m Breaststroke | 31.13 | Western Region Short Course Championships | 2026-02-12 |
| 50m Butterfly | 29.51 | June Performance Meet 2025 | 2025-06-06 |
| 50m Butterfly | 28.30 | Western Region Short Course Championships | 2026-02-12 |
| 50m Freestyle | 27.77 | June Performance Meet 2025 | 2025-06-06 |
| 50m Freestyle | 27.37 | 2025 MMST Dash 4 Cash | 2025-10-18 |
| 800m Freestyle | 9:08.83 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 800m Freestyle | 8:56.64 | Western Region Short Course Championships | 2026-02-12 |
Gray, Jack's top personal bests include 100m Backstroke (1:04.81), 100m Backstroke (1:01.04), 100m Breaststroke (1:08.82), 100m Breaststroke (1:08.00), 100m Butterfly (1:06.75).
Gray, Jack swims for Cambridge Aquajets.
Gray, Jack has competed in 10 meets.