| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:10.45 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 100m Breaststroke | 1:06.00 | Scar Pan Am Winter Classic | 2026-01-16 |
| 100m Breaststroke | 1:05.97 | RHAC Fall Classic 2025 | 2025-10-24 |
| 100m Freestyle | 57.12 | RHAC Fall Classic 2025 | 2025-10-24 |
| 200m Breaststroke | 2:26.48 | 2026 MMST GTA Skins | 2026-02-13 |
| 200m Breaststroke | 2:21.77 | RHAC Fall Classic 2025 | 2025-10-24 |
| 200m Freestyle | 2:13.06 | Scar Pan Am Winter Classic | 2026-01-16 |
| 200m Freestyle | 2:03.52 | RHAC Fall Classic 2025 | 2025-10-24 |
| 200m IM | 2:14.94 | RHAC Fall Classic 2025 | 2025-10-24 |
| 400m Freestyle | 4:23.16 | RHAC Fall Classic 2025 | 2025-10-24 |
| 50m Breaststroke | 29.98 | 2026 MMST GTA Skins | 2026-02-13 |
| 50m Breaststroke | 30.24 | RHAC Fall Classic 2025 | 2025-10-24 |
| 50m Butterfly | 30.16 | 2026 MMST GTA Skins | 2026-02-13 |
| 50m Freestyle | 27.06 | 2026 MMST GTA Skins | 2026-02-13 |
| 800m Freestyle | 9:58.20 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 800m Freestyle | 9:01.22 | 2025 Fall Distance Time Trial | 2025-11-15 |
Mancini, Matteo's top personal bests include 100m Backstroke (1:10.45), 100m Breaststroke (1:06.00), 100m Breaststroke (1:05.97), 100m Freestyle (57.12), 200m Breaststroke (2:26.48).
Mancini, Matteo swims for Newmarket Stingrays Swim Club.
Mancini, Matteo has competed in 6 meets.