| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:36.97 | 2026 Joanne Malar Invitational | 2026-01-16 |
| 100m Butterfly | 1:39.87 | 2026 Joanne Malar Invitational | 2026-01-16 |
| 100m Freestyle | 1:24.76 | 2026 Joanne Malar Invitational | 2026-01-16 |
| 200m Backstroke | 3:42.93 | 2025 Alex Baumann Invitational | 2025-11-21 |
| 200m Freestyle | 3:04.42 | 2026 Joanne Malar Invitational | 2026-01-16 |
| 200m IM | 3:22.21 | 2026 Joanne Malar Invitational | 2026-01-16 |
| 50m Backstroke | 46.01 | 2026 Joanne Malar Invitational | 2026-01-16 |
| 50m Breaststroke | 50.45 | 2026 Joanne Malar Invitational | 2026-01-16 |
| 50m Butterfly | 40.31 | 2026 Joanne Malar Invitational | 2026-01-16 |
| 50m Freestyle | 36.19 | 2026 Joanne Malar Invitational | 2026-01-16 |
Warren, Declan's top personal bests include 100m Backstroke (1:36.97), 100m Butterfly (1:39.87), 100m Freestyle (1:24.76), 200m Backstroke (3:42.93), 200m Freestyle (3:04.42).
Warren, Declan swims for Burlington Aquatic Devilrays.
Warren, Declan has competed in 8 meets.