| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:09.35 | Western Transmountain Festival I | 2026-02-14 |
| 100m Backstroke | 1:01.89 | 2025 PCS Xmas Cracker | 2025-12-05 |
| 100m Breaststroke | 1:16.03 | Western Transmountain Festival III | 2026-02-20 |
| 100m Breaststroke | 1:13.12 | 2025 KSC SC Invitational | 2025-11-21 |
| 100m Butterfly | 1:06.45 | Summer Provincial Championships LC | 2025-07-24 |
| 100m Butterfly | 1:04.59 | 2025 KSC SC Invitational | 2025-11-21 |
| 100m Freestyle | 57.05 | Western Transmountain Festival III | 2026-02-20 |
| 100m Freestyle | 55.98 | 2025 PCS Xmas Cracker | 2025-12-05 |
| 100m IM | 1:05.96 | 2025 Friesen Plastics LASC Fall Challenge | 2025-10-24 |
| 200m Backstroke | 2:28.60 | Western Transmountain Festival I | 2026-02-14 |
| 200m Backstroke | 2:18.04 | 2025 PCS Xmas Cracker | 2025-12-05 |
| 200m Butterfly | 2:26.89 | 2025 KSC SC Invitational | 2025-11-21 |
| 200m Freestyle | 2:06.28 | Summer Provincial Championships LC | 2025-07-24 |
| 200m Freestyle | 2:07.65 | 2025 Friesen Plastics LASC Fall Challenge | 2025-10-24 |
| 200m IM | 2:20.51 | Western Transmountain Festival III | 2026-02-20 |
| 200m IM | 2:17.21 | 2025 PCS Xmas Cracker | 2025-12-05 |
| 400m Freestyle | 4:43.32 | Western Transmountain Festival III | 2026-02-20 |
| 400m Freestyle | 4:39.96 | 2025 KSC SC Invitational | 2025-11-21 |
| 50m Backstroke | 31.24 | Western Transmountain Festival I | 2026-02-14 |
| 50m Backstroke | 29.31 | 2025 PCS Xmas Cracker | 2025-12-05 |
| 50m Breaststroke | 35.12 | Western Transmountain Festival III | 2026-02-20 |
| 50m Breaststroke | 34.14 | Cascade Speed Meet 2025 Provincial Series #1 | 2025-11-08 |
| 50m Butterfly | 28.75 | Western Transmountain Festival I | 2026-02-14 |
| 50m Butterfly | 29.06 | Cascade Speed Meet 2025 Provincial Series #1 | 2025-11-08 |
| 50m Freestyle | 26.69 | Western Transmountain Festival I | 2026-02-14 |
| 50m Freestyle | 25.37 | 2025 PCS Xmas Cracker | 2025-12-05 |
Piatek, Sean's top personal bests include 100m Backstroke (1:09.35), 100m Backstroke (1:01.89), 100m Breaststroke (1:16.03), 100m Breaststroke (1:13.12), 100m Butterfly (1:06.45).
Piatek, Sean swims for Killarney Swim Club.
Piatek, Sean has competed in 8 meets.