| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:37.55 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m Breaststroke | 1:52.91 | RHAC Fall Classic 2025 | 2025-10-24 |
| 100m Butterfly | 1:46.12 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m Freestyle | 1:28.34 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m IM | 1:42.27 | 2025 BTSC Trojan Cup | 2025-12-12 |
| 200m Backstroke | 3:44.04 | 2025 Alan Swanston Classic | 2025-12-05 |
| 200m Breaststroke | 4:16.08 | 2025 BTSC Trojan Cup | 2025-12-12 |
| 200m Freestyle | 3:08.86 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 200m IM | 3:31.07 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 50m Backstroke | 44.88 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 50m Breaststroke | 53.45 | 2025 Alan Swanston Classic | 2025-12-05 |
| 50m Butterfly | 43.17 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 50m Freestyle | 42.38 | RHAC Fall Classic 2025 | 2025-10-24 |
Yousef, Mark's top personal bests include 100m Backstroke (1:37.55), 100m Breaststroke (1:52.91), 100m Butterfly (1:46.12), 100m Freestyle (1:28.34), 100m IM (1:42.27).
Yousef, Mark swims for Newmarket Stingrays Swim Club.
Yousef, Mark has competed in 6 meets.