Marcus So
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 25.96 | A+0.37s to AA | 2025-01-01 | 2025 Gulf Senior Championships |
| 100 Freestyle | SCY | 1:06.78 | B+4.09s to BB | 2025-02-22 | MAC Hosted 2025 Gulf 12 & Under Champs venue |
| 200 Freestyle | SCY | 2:09.41 | BB+2.72s to A | 2026-01-01 | PACK |
| 500 Freestyle | SCY | 5:51.46 | BB+9.77s to A | 2025-01-01 | 2025 Gulf Senior Championships |
| 1650 Freestyle | SCY | 20:43.51 | BB+54.22s to A | 2026-01-01 | PACK |
| 50 Backstroke | SCY | 32.56 | BB+2.17s to A | 2025-02-22 | MAC Hosted 2025 Gulf 12 & Under Champs venue |
| 100 Backstroke | SCY | 1:09.06 | BB+5.27s to A | 2025-01-01 | 2025 Gulf Senior Championships |
| 200 Backstroke | SCY | 2:16.93 | A+3.74s to AA | 2026-01-01 | PACK |
| 50 Breaststroke | SCY | 38.90 | B+1.31s to BB | 2025-02-02 | 2025 Fleet Mardi Gras venue |
| 100 Breaststroke | SCY | 1:27.46 | +3.17s to B | 2024-12-21 | 2024 Gulf Fall Champs (ESCA & AMBU) venue |
| 50 Butterfly | SCY | 34.50 | B+2.31s to BB | 2024-10-13 | PACK Pretty in Pink Invitational Meet 2024 venue |
| 100 Butterfly | SCY | 1:44.11 | +30.32s to B | 2024-04-13 | MAC 2024 April Developmental Meet venue |
| 200 Butterfly | SCY | 3:04.84 | +19.55s to B | 2026-01-01 | PACK |
| 100 Individual Medley | SCY | 1:14.72 | 2024-12-21 | 2024 Gulf Fall Champs (ESCA & AMBU) venue | |
| 200 Individual Medley | SCY | 2:32.40 | BB+11.21s to A | 2026-01-01 | PACK |
| 50 Freestyle | LCM | 28.11 | AA+0.12s to AAA | 2026-06-06 | 2026 ST SRG Arena Surge Shark Sizzler fast pool |
| 100 Freestyle | LCM | 1:03.99 | AA+2.50s to AAA | 2026-06-07 | 2026 ST SRG Arena Surge Shark Sizzler fast pool |
| 200 Freestyle | LCM | 2:22.45 | A+2.76s to AA | 2026-06-05 | 2026 ST SRG Arena Surge Shark Sizzler fast pool |
| 800 Freestyle | LCM | 10:29.25 | A+12.06s to AA | 2026-05-09 | 2026 FLEET Distance Challenge |
| 50 Backstroke | LCM | 34.44 | A+0.55s to AA | 2026-06-05 | 2026 ST SRG Arena Surge Shark Sizzler fast pool |
| 100 Backstroke | LCM | 1:18.42 | BB+3.53s to A | 2026-05-15 | 2026 Fleet Summer Classic |
| 50 Breaststroke | LCM | 39.31 | A+1.62s to AA | 2026-06-07 | 2026 ST SRG Arena Surge Shark Sizzler fast pool |
| 100 Breaststroke | LCM | 1:28.82 | BB+5.53s to A | 2026-06-06 | 2026 ST SRG Arena Surge Shark Sizzler fast pool |
| 200 Breaststroke | LCM | 2:49.11 | AA+1.42s to AAA | 2026-04-17 | PACK Long Course Kick-Off Meet 2026 |
| 50 Butterfly | LCM | 31.44 | AA+0.75s to AAA | 2026-06-06 | 2026 ST SRG Arena Surge Shark Sizzler fast pool |
| 200 Individual Medley | LCM | 2:43.41 | BB+0.22s to A | 2026-06-07 | 2026 ST SRG Arena Surge Shark Sizzler fast pool |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 13.
Pool tags are a venue speed heuristic (median deviation of all swims there vs each swimmer's typical time) — see the venue page for the method.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Freestyle | SCY | 28.55 | flat | 200 Free Relay | 2025-02-22 | MAC Hosted 2025 Gulf 12 & Under Champs |
| 50 Freestyle | SCY | 28.05 | flying | 200 Free Relay (leg 3) | 2025-02-02 | 2025 Fleet Mardi Gras |
| 50 Freestyle | SCY | 27.05 | flying | 200 Medley Relay (leg 4) | 2025-02-01 | 2025 Fleet Mardi Gras |
| 50 Backstroke | SCY | 57.93 | flat | 200 Medley Relay | 2024-12-22 | 2024 Gulf Fall Champs (ESCA & AMBU) |
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 13-14 · SCY
1890 points (4/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 5:51.46 | 557 |
| 200 BK SCY | 2:16.93 | 607 |
| 200 FL SCY | 3:04.84 | 257 |
| 200 IM SCY | 2:32.40 | 469 |
| 200 BR SCY | — | 0 |
| 400 IM SCY | — | 0 |
IMR 13-14 · LCM
2242 points (4/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 FR LCM | 2:22.45 | 643 |
| 100 BK LCM | 1:18.42 | 513 |
| 100 BR LCM | 1:28.82 | 495 |
| 200 IM LCM | 2:43.41 | 591 |
| 100 FL LCM | — | 0 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 1:06.78
Front half 32.08s · back half 34.70s
100 Breaststroke SCY 1:27.46
Front half 43.38s · back half 44.08s
100 Butterfly SCY 1:44.11
Front half 44.04s · back half 60.07s
100 Individual Medley SCY 1:14.72
Front half 33.04s · back half 41.68s
200 Freestyle LCM 2:22.45
Front half 69.33s · back half 73.12s
100 Breaststroke LCM 1:28.82
Front half 42.62s · back half 46.20s
200 Individual Medley LCM 2:43.41
Front half 79.50s · back half 83.91s
Progression
Faster times are higher. One card per event, all courses & history.