| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:08.57 | LAC - Dr. Paul Hauch Invitational | 2025-07-05 |
| 100m Breaststroke | 1:10.80 | KBM Heats & Finals | 2026-02-20 |
| 100m Butterfly | 1:10.27 | KBM Heats & Finals | 2026-02-20 |
| 100m Freestyle | 59.02 | KBM Heats & Finals | 2026-02-20 |
| 1500m Freestyle | 2:17.81 | KBM Distance & Development | 2025-11-08 |
| 200m Backstroke | 2:26.86 | KBM Heats & Finals | 2026-02-20 |
| 200m Breaststroke | 2:34.12 | 2026 Eastern Ontario Regional Championship - Winte | 2026-01-30 |
| 200m Butterfly | 2:47.02 | KBM Distance & Development | 2025-11-08 |
| 200m Freestyle | 2:08.17 | 2026 Eastern Ontario Regional Championship - Winte | 2026-01-30 |
| 200m IM | 2:23.92 | 2026 Eastern Ontario Regional Championship - Winte | 2026-01-30 |
| 400m Freestyle | 4:35.08 | KBM Heats & Finals | 2026-02-20 |
| 400m IM | 5:11.59 | KBM Heats & Finals | 2026-02-20 |
| 50m Backstroke | 32.43 | KBM Pentathlon | 2025-10-19 |
| 50m Breaststroke | 32.37 | KBM Pentathlon | 2025-10-19 |
| 50m Butterfly | 30.48 | KBM Distance & Development | 2025-11-08 |
| 50m Freestyle | 27.38 | LAC - Dr. Paul Hauch Invitational | 2025-07-05 |
| 800m Freestyle | 9:28.38 | 2026 Eastern Ontario Regional Championship - Winte | 2026-01-30 |
Janssen, Devin's top personal bests include 100m Backstroke (1:08.57), 100m Breaststroke (1:10.80), 100m Butterfly (1:10.27), 100m Freestyle (59.02), 1500m Freestyle (2:17.81).
Janssen, Devin swims for Kingston Blue Marlins.
Janssen, Devin has competed in 10 meets.