Mark Du
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 26.50 | AA+0.71s to AAA·+3.31s to Sectionals | 2026-01-18 | 2026 CA Trident Swim Club Winter Invite - cop venue |
| 100 Freestyle | SCY | 56.15 | AAA+2.46s to AAAA·+5.16s to Sectionals | 2025-12-14 | 2025 CA GWSC Winter Age Group Invitational venue |
| 200 Freestyle | SCY | 2:09.52 | A+1.33s to AA·+17.73s to Sectionals | 2026-02-13 | 2026 Metro Champs @ La Mirada Armada venue |
| 500 Freestyle | SCY | 6:02.47 | BB+2.48s to A·+59.78s to Sectionals | 2026-01-17 | 2026 CA Trident Swim Club Winter Invite - cop venue |
| 50 Backstroke | SCY | 30.75 | AA+1.06s to AAA·+7.06s to Futures | 2026-02-13 | 2026 Metro Champs @ La Mirada Armada venue |
| 100 Backstroke | SCY | 1:04.21 | AA+1.42s to AAA·+8.72s to Sectionals | 2025-12-06 | 2025 CA Trident Swim Club SC Dec Meet venue |
| 200 Backstroke | SCY | 2:22.92 | A+0.93s to AA·+21.63s to Sectionals | 2026-01-18 | 2026 CA Trident Swim Club Winter Invite - cop venue |
| 50 Breaststroke | SCY | 33.12 | AAA+1.63s to AAAA·+6.83s to Futures | 2026-03-14 | 2026 SCS Spring Age Group Champs @ RMDA - cop venue |
| 100 Breaststroke | SCY | 1:13.03 | AA+1.64s to AAA·+9.84s to Sectionals | 2026-01-25 | 2026 SCS Swim Festival venue |
| 200 Breaststroke | SCY | 2:44.93 | A+3.54s to AA·+27.64s to Sectionals | 2025-12-06 | 2025 CA Trident Swim Club SC Dec Meet venue |
| 50 Butterfly | SCY | 27.01 | AAA+0.32s to AAAA·+4.12s to Futures | 2026-03-15 | 2026 SCS Spring Age Group Champs @ RMDA - cop venue |
| 100 Butterfly | SCY | 1:01.30 | AAA+2.21s to AAAA·+6.11s to Sectionals | 2026-03-14 | 2026 SCS Spring Age Group Champs @ RMDA - cop venue |
| 100 Individual Medley | SCY | 1:03.96 | AAA+2.87s to AAAA | 2026-02-15 | 2026 Metro Champs @ La Mirada Armada venue |
| 200 Individual Medley | SCY | 2:20.23 | AA+1.44s to AAA·+16.24s to Sectionals | 2026-01-19 | 2026 CA Trident Swim Club Winter Invite - cop venue |
| 400 Individual Medley | SCY | 5:18.24 | A+8.25s to AA·+53.55s to Sectionals | 2025-12-07 | 2025 CA Trident Swim Club SC Dec Meet venue |
| 50 Freestyle | LCM | 28.61 | AAA+0.52s to AAAA·+1.62s to Sectionals | 2026-06-14 | ARMADA-2026 SCS June AG Invite venue |
| 100 Freestyle | LCM | 1:05.61 | AA+1.12s to AAA·+6.62s to Sectionals | 2026-05-03 | 26 ESA Dolphins Swim Team venue |
| 50 Backstroke | LCM | 34.38 | AAA+1.69s to AAAA·+6.49s to Futures | 2026-04-26 | CA 2026 NOVApril Intrasquad Meet venue |
| 100 Backstroke | LCM | 1:12.25 | AAA+1.86s to AAAA·+7.06s to Sectionals | 2026-06-14 | ARMADA-2026 SCS June AG Invite venue |
| 50 Breaststroke | LCM | 36.02 | AAAA·+5.13s to Futures | 2026-06-14 | ARMADA-2026 SCS June AG Invite venue |
| 100 Breaststroke | LCM | 1:19.97 | AAA+0.98s to AAAA·+6.27s to Sectionals | 2026-06-13 | ARMADA-2026 SCS June AG Invite venue |
| 50 Butterfly | LCM | 30.04 | AAAA·+3.75s to Futures | 2026-06-12 | ARMADA-2026 SCS June AG Invite venue |
| 100 Butterfly | LCM | 1:08.38 | AAA+0.59s to AAAA·+5.29s to Sectionals | 2026-06-11 | ARMADA-2026 SCS June AG Invite venue |
| 200 Individual Medley | LCM | 2:44.94 | AA+6.15s to AAA·+20.25s to Sectionals | 2026-04-25 | CA 2026 NOVApril Intrasquad Meet venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 12.
National cuts (Sectionals → Nationals) are the current-season meet qualifying times for the swimmer's zone and age group; ✓ marks the hardest cut already achieved.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Freestyle | SCY | 26.00 | flat | 200 Free Relay | 2026-03-15 | 2026 SCS Spring Age Group Champs @ RMDA - cop |
| 50 Butterfly | SCY | 27.46 | flying | 200 Medley Relay (leg 3) | 2026-03-15 | 2026 SCS Spring Age Group Champs @ RMDA - cop |
| 50 Freestyle | LCM | 31.21 | flying | 200 Free Relay (leg 2) | 2025-06-14 | 2025 CA SCS RAA June Age Group Championships |
| 100 Freestyle | LCM | 3:20.80 | flying | 400 Free Relay (leg 3) | 2025-07-27 | 2025 CA SCS/RAA Summer A/G Champs |
| 100 Breaststroke | LCM | 1:29.00 | flying | 400 Medley Relay (leg 2) | 2025-07-26 | 2025 CA SCS/RAA Summer A/G Champs |
| 50 Butterfly | LCM | 32.86 | flying | 200 Medley Relay (leg 3) | 2025-07-25 | 2025 CA SCS/RAA Summer A/G Champs |
Reconstructed from relay split marks. Flat = lead-off (comparable to individual times); flying starts run ~0.5–0.7s fast and are not PRs.
IMX / IMR
IMX 11-12 · SCY
3980 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 6:02.47 | 656 |
| 100 BK SCY | 1:04.21 | 795 |
| 100 BR SCY | 1:13.03 | 799 |
| 100 FL SCY | 1:01.30 | 895 |
| 200 IM SCY | 2:20.23 | 835 |
IMR 11-12 · SCY
4200 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:09.52 | 736 |
| 50 BK SCY | 30.75 | 770 |
| 50 BR SCY | 33.12 | 859 |
| 50 FL SCY | 27.01 | 964 |
| 100 IM SCY | 1:03.96 | 871 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 56.15
Front half 27.38s · back half 28.77s
200 Freestyle SCY 2:09.52
Front half 63.66s · back half 65.86s
500 Freestyle SCY 6:02.47
Front half 180.03s · back half 182.44s
100 Backstroke SCY 1:04.21
Front half 31.78s · back half 32.43s
200 Backstroke SCY 2:22.92
Front half 70.14s · back half 72.78s
100 Breaststroke SCY 1:13.03
Front half 34.75s · back half 38.28s
200 Breaststroke SCY 2:44.93
Front half 78.00s · back half 86.93s
100 Butterfly SCY 1:01.30
Front half 29.53s · back half 31.77s
100 Individual Medley SCY 1:03.96
Front half 30.71s · back half 33.25s
200 Individual Medley SCY 2:20.23
Front half 65.48s · back half 74.75s
400 Individual Medley SCY 5:18.24
Front half 155.30s · back half 162.94s
100 Backstroke LCM 1:12.25
Front half 35.16s · back half 37.09s
200 Individual Medley LCM 2:44.94
Front half 79.26s · back half 85.68s
Reaction time
From electronically-timed starts only (~2% of corpus swims carry a reaction time). PRs with a recorded reaction show an RT chip in the splits section above.
Progression
Faster times are higher. One card per event, all courses & history.