| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:17.93 | 2025 NYAC Cup | 2025-11-14 |
| 100m Breaststroke | 1:39.11 | 2025 NYAC Cup | 2025-11-14 |
| 100m Butterfly | 1:17.40 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Freestyle | 1:04.47 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 200m Backstroke | 2:45.93 | COBRA 2026 Stephen Clarke Classic | 2026-01-10 |
| 200m Butterfly | 3:01.50 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 200m Freestyle | 2:21.13 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 200m IM | 2:41.56 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 400m Freestyle | 5:08.23 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 400m IM | 5:54.59 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 50m Backstroke | 36.88 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 50m Butterfly | 35.24 | 2025 Murray Drudge Invitational | 2025-12-05 |
| 50m Freestyle | 30.02 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
Mitchell, Rhys's top personal bests include 100m Backstroke (1:17.93), 100m Breaststroke (1:39.11), 100m Butterfly (1:17.40), 100m Freestyle (1:04.47), 200m Backstroke (2:45.93).
Mitchell, Rhys swims for North York Aquatic Club.
Mitchell, Rhys has competed in 8 meets.