| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:39.29 | MAC Rising Star #2 | 2025-05-30 |
| 100m Backstroke | 1:30.37 | MAC Jingle Bell | 2025-12-12 |
| 100m Breaststroke | 1:50.89 | MAC Rising Star #2 | 2025-05-30 |
| 100m Breaststroke | 1:34.90 | MAC Jingle Bell | 2025-12-12 |
| 100m Freestyle | 1:25.55 | MAC Rising Star #2 | 2025-05-30 |
| 100m Freestyle | 1:09.65 | MAC Jingle Bell | 2025-12-12 |
| 100m IM | 1:23.71 | Pan Am Open 2026 | 2026-02-21 |
| 200m Backstroke | 3:30.65 | MAC Rising Star #2 | 2025-05-30 |
| 200m Freestyle | 3:11.87 | MAC Rising Star #2 | 2025-05-30 |
| 200m Freestyle | 2:43.92 | MAC Jingle Bell | 2025-12-12 |
| 200m IM | 3:05.00 | MAC Jingle Bell | 2025-12-12 |
| 50m Backstroke | 41.90 | MAC Jingle Bell | 2025-12-12 |
| 50m Breaststroke | 42.69 | MAC Jingle Bell | 2025-12-12 |
| 50m Butterfly | 38.76 | MAC Rising Star #1 | 2025-11-08 |
| 50m Freestyle | 37.07 | MAC Rising Star #2 | 2025-05-30 |
| 50m Freestyle | 31.24 | Pan Am Open 2026 | 2026-02-21 |
David Cheng's top personal bests include 100m Backstroke (1:39.29), 100m Backstroke (1:30.37), 100m Breaststroke (1:50.89), 100m Breaststroke (1:34.90), 100m Freestyle (1:25.55).
David Cheng swims for Markham Aquatic Club.
David Cheng has competed in 4 meets.