| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:20.37 | Hard off the Block Invitational | 2026-02-20 |
| 100m Breaststroke | 1:46.23 | Winter Waves Invitational | 2026-03-13 |
| 100m Butterfly | 1:38.67 | Bluefins Fall Pentathlon | 2025-11-14 |
| 100m Freestyle | 1:12.65 | Hard off the Block Invitational | 2026-02-20 |
| 200m Backstroke | 2:48.98 | Winter Waves Invitational | 2026-03-13 |
| 200m Freestyle | 2:41.35 | Winter Waves Invitational | 2026-03-13 |
| 200m IM | 2:59.60 | Winter Waves Invitational | 2026-03-13 |
| 400m Freestyle | 6:01.76 | Icebreaker Invitational | 2026-01-30 |
| 50m Backstroke | 36.39 | Icebreaker Invitational | 2026-01-30 |
| 50m Breaststroke | 48.09 | Winter Waves Invitational | 2026-03-13 |
| 50m Butterfly | 38.57 | Winter Waves Invitational | 2026-03-13 |
| 50m Freestyle | 32.97 | Hard off the Block Invitational | 2026-02-20 |
Watton, William's top personal bests include 100m Backstroke (1:20.37), 100m Breaststroke (1:46.23), 100m Butterfly (1:38.67), 100m Freestyle (1:12.65), 200m Backstroke (2:48.98).
Watton, William swims for St. John's Legends Swim Club.
Watton, William has competed in 6 meets.