| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:17.80 | SLSC Spring Time Trial | 2025-05-31 |
| 100m Breaststroke | 1:12.93 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 100m Breaststroke | 1:12.90 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 100m Butterfly | 1:10.75 | 2025 Age Group International LC | 2025-06-05 |
| 100m Butterfly | 1:12.47 | 2025-2026 SSAT Invitational - NEOR 1 | 2025-10-25 |
| 100m Freestyle | 1:04.99 | 2025 Age Group International LC | 2025-06-05 |
| 100m Freestyle | 1:03.54 | 2025-2026 SSAT Invitational - NEOR 1 | 2025-10-25 |
| 200m Backstroke | 2:46.23 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 200m Backstroke | 2:39.00 | 2025-2026 SSAT Invitational - NEOR 1 | 2025-10-25 |
| 200m Breaststroke | 2:37.73 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 200m Breaststroke | 2:35.68 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 200m Butterfly | 2:39.10 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 200m Butterfly | 2:33.82 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 200m Freestyle | 2:18.07 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 200m Freestyle | 2:15.68 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 200m IM | 2:26.55 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 200m IM | 2:21.26 | 2026 Dave Kensit Memorial SC Championship | 2026-02-06 |
| 400m Freestyle | 4:47.19 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 400m IM | 5:15.13 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 400m IM | 5:10.72 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 50m Breaststroke | 33.72 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 50m Breaststroke | 33.35 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 50m Butterfly | 31.19 | 2026 Dave Kensit Memorial SC Championship | 2026-02-06 |
| 50m Freestyle | 29.47 | 2025-2026 SSAT Invitational - NEOR 1 | 2025-10-25 |
| 800m Freestyle | 10:05.80 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 800m Freestyle | 9:39.32 | 2026 Dave Kensit Memorial SC Championship | 2026-02-06 |
Duncan, Callum's top personal bests include 100m Backstroke (1:17.80), 100m Breaststroke (1:12.93), 100m Breaststroke (1:12.90), 100m Butterfly (1:10.75), 100m Butterfly (1:12.47).
Duncan, Callum swims for Sudbury Laurentian Swim Club.
Duncan, Callum has competed in 7 meets.