swimMason Yu
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 25 Freestyle | SCY | 17.98 | 2023-12-07 | BGC-N. Westchester Marlins | |
| 50 Freestyle | SCY | 31.31 | BB+0.12s to A·+8.92s to Sectionals | 2025-10-26 | 2025 MR QNS Can I Kick It Invitationalvenue |
| 100 Freestyle | SCY | 1:04.67 | AA+0.58s to AAA·+16.18s to Sectionals | 2024-10-26 | 2024 MR QNS Can I Kick It Invitational |
| 200 Freestyle | SCY | 2:26.43 | A+1.04s to AA·+40.14s to Sectionals | 2026-03-15 | 2026 MR SC Junior Metropolitan Championshipsvenue |
| 500 Freestyle | SCY | 6:34.54 | A+7.75s to AA·+107.15s to Sectionals | 2026-02-20 | 2026 MR Metro Silver Central Champs - WESTvenue |
| 25 Backstroke | SCY | 21.64 | 2023-12-07 | BGC-N. Westchester Marlins | |
| 50 Backstroke | SCY | 35.87 | AA+1.68s to AAA·+12.18s to Futures | 2026-02-08 | 2026 MR QNS We Fly High Invitationalvenue |
| 100 Backstroke | SCY | 1:17.51 | A+1.22s to AA·+23.02s to Sectionals | 2025-12-12 | 2025 Katie Ledecky Invitationalvenue |
| 25 Breaststroke | SCY | 25.53 | 2023-10-28 | 2023 MR QNS Can I Kick It SCY Invitational | |
| 50 Breaststroke | SCY | 41.76 | A+1.57s to AA·+15.47s to Futures | 2025-11-23 | 2025 MR QNS Protect Ya Turkey Neck Invitevenue |
| 100 Breaststroke | SCY | 1:31.69 | A+4.00s to AA·+30.20s to Sectionals | 2025-10-25 | 2025 MR QNS Can I Kick It Invitationalvenue |
| 25 Butterfly | SCY | 17.93 | 2024-03-02 | 2024 MR Metro 8 & Under Championships | |
| 50 Butterfly | SCY | 31.97 | AAA+1.18s to AAAA·+9.08s to Futures | 2026-03-15 | 2026 MR SC Junior Metropolitan Championshipsvenue |
| 100 Butterfly | SCY | 1:12.82 | AAA+2.83s to AAAA·+19.63s to Sectionals | 2026-03-14 | 2026 MR SC Junior Metropolitan Championshipsvenue |
| 100 Individual Medley | SCY | 1:15.11 | AA+1.92s to AAA | 2026-03-14 | 2026 MR SC Junior Metropolitan Championshipsvenue |
| 200 Individual Medley | SCY | 2:39.76 | AA+1.37s to AAA·+40.37s to Sectionals | 2025-12-13 | 2025 Katie Ledecky Invitationalvenue |
| 25 Freestyle | SCM | 22.65 | 2023-06-04 | 2023 MR FREE SCM Summer Splash Invitevenue | |
| 50 Freestyle | SCM | 50.70 | +8.31s to B·+26.01s to Sectionals | 2023-06-03 | 2023 MR FREE SCM Summer Splash Invitevenue |
| 25 Backstroke | SCM | 29.72 | 2023-06-03 | 2023 MR FREE SCM Summer Splash Invitevenue | |
| 25 Breaststroke | SCM | 37.65 | 2023-06-03 | 2023 MR FREE SCM Summer Splash Invitevenue | |
| 25 Butterfly | SCM | 23.33 | 2023-06-04 | 2023 MR FREE SCM Summer Splash Invitevenue | |
| 100 Individual Medley | SCM | 2:13.72 | +23.43s to B | 2023-06-04 | 2023 MR FREE SCM Summer Splash Invitevenue |
| 50 Freestyle | LCM | 33.84 | AA+0.85s to AAA·+8.35s to Sectionals | 2026-08-01 | 2026 EZ LC Age Group Championshipfast pool |
| 100 Freestyle | LCM | 1:13.63 | AA+0.34s to AAA·+18.14s to Sectionals | 2026-07-29 | 2026 EZ LC Age Group Championshipfast pool |
| 200 Freestyle | LCM | 2:52.82 | A+6.43s to AA·+51.53s to Sectionals | 2026-04-25 | MR QNS 2026 It's Spring Again LCM Invite |
| 400 Freestyle | LCM | 6:21.04 | BB+13.85s to A·+123.45s to Sectionals | 2025-04-26 | 2025 MR QNS It's Spring Again Invitational |
| 50 Backstroke | LCM | 43.27 | BB+0.18s to A·+15.38s to Futures | 2026-04-26 | MR QNS 2026 It's Spring Again LCM Invitevenue |
| 100 Backstroke | LCM | 1:28.00 | AA+3.91s to AAA·+26.01s to Sectionals | 2026-05-10 | 2026 MR LIE May Extravaganza Invitationalvenue |
| 50 Breaststroke | LCM | 45.56 | AA+1.97s to AAA·+14.67s to Futures | 2026-07-29 | 2026 EZ LC Age Group Championshipfast pool |
| 100 Breaststroke | LCM | 1:33.09 | AAA+1.20s to AAAA·+23.40s to Sectionals | 2025-07-18 | 2025 MR LC Junior Mets Championship |
| 50 Butterfly | LCM | 33.81 | AAAA·+7.52s to Futures | 2026-07-30 | 2026 EZ LC Age Group Championshipfast pool |
| 100 Butterfly | LCM | 1:20.22 | AAA+0.63s to AAAA·+20.03s to Sectionals | 2026-07-29 | 2026 EZ LC Age Group Championshipfast pool |
| 200 Individual Medley | LCM | 2:54.28 | AAA+1.79s to AAAA·+38.09s to Sectionals | 2026-08-01 | 2026 EZ LC Age Group Championshipfast pool |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 10.
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.
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 | 30.40 | flat | 200 Free Relay | 2026-03-14 | 2026 MR SC Junior Metropolitan Championships |
| 50 Freestyle | SCY | 36.05 | flying | 200 Free Relay (leg 2) | 2025-10-04 | 2025 MR QNS Hello Brooklyn Invitational |
| 100 Freestyle | SCY | 1:12.13 | flat | 400 Free Relay | 2026-03-13 | 2026 MR SC Junior Metropolitan Championships |
| 50 Butterfly | SCY | 31.28 | flying | 200 Medley Relay (leg 3) | 2026-03-15 | 2026 MR SC Junior Metropolitan Championships |
| 50 Freestyle | LCM | 32.89 | flying | 200 Free Relay (leg 2) | 2026-07-29 | 2026 EZ LC Age Group Championship |
| 100 Freestyle | LCM | 1:12.93 | flying | 400 Free Relay (leg 2) | 2026-07-31 | 2026 EZ LC Age Group Championship |
| 50 Butterfly | LCM | 33.94 | flying | 200 Medley Relay (leg 3) | 2026-08-01 | 2026 EZ LC Age Group Championship |
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 10 & under · LCM
4322 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR LCM | 2:52.82 | 676 |
| 100 BK LCM | 1:28.00 | 751 |
| 100 BR LCM | 1:33.09 | 955 |
| 100 FL LCM | 1:20.22 | 976 |
| 200 IM LCM | 2:54.28 | 964 |
IMR 10 & under · LCM
4274 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 100 FR LCM | 1:13.63 | 851 |
| 50 BK LCM | 43.27 | 624 |
| 50 BR LCM | 45.56 | 755 |
| 50 FL LCM | 33.81 | 1080 |
| 200 IM LCM | 2:54.28 | 964 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
200 Freestyle SCY 2:26.43
Front half 71.92s · back half 74.51s
500 Freestyle SCY 6:34.54
Front half 198.95s · back half 195.59s
100 Backstroke SCY 1:17.51
Front half 37.53s · back half 39.98s
100 Breaststroke SCY 1:31.69
Front half 44.52s · back half 47.17s
100 Butterfly SCY 1:12.82
Front half 34.83s · back half 37.99s
100 Individual Medley SCY 1:15.11
Front half 35.73s · back half 39.38s
200 Individual Medley SCY 2:39.76
Front half 76.58s · back half 83.18s
100 Freestyle LCM 1:13.63
Front half 35.51s · back half 38.12s
200 Freestyle LCM 2:52.82
Front half 84.58s · back half 88.24s
400 Freestyle LCM 6:21.04 split/total mismatch
100 Backstroke LCM 1:28.00
Front half 44.27s · back half 43.73s
100 Butterfly LCM 1:20.22
Front half 36.63s · back half 43.59s
200 Individual Medley LCM 2:54.28
Front half 85.04s · back half 89.24s
Swim history
Every recorded swim, newest first
| Date | Event | Course | Time | Age | Round | Meet |
|---|
Individual swims with a recorded date and time — including disqualifications — plus reconstructed relay legs (marked). Assembled in the browser from this page’s data.
Progression
Faster times are higher. One card per event, all courses & history.