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 | 2025-10-25 | 2025 MR QNS Can I Kick It Invitational |
| 100 Freestyle | SCY | 1:02.08 | AAA+0.99s to AAAA | 2026-01-01 | qns 28february2026 |
| 200 Freestyle | SCY | 2:26.43 | A+1.04s to AA | 2026-03-15 | 2026 MR SC Junior Metropolitan Championships venue |
| 500 Freestyle | SCY | 6:34.54 | A+7.75s to AA | 2026-02-20 | 2026 MR Metro Silver Central Champs - WEST venue |
| 25 Backstroke | SCY | 21.64 | 2023-12-07 | BGC-N. Westchester Marlins | |
| 50 Backstroke | SCY | 35.87 | AA+1.68s to AAA | 2026-01-01 | qns 07february2026 |
| 100 Backstroke | SCY | 1:17.51 | A+1.22s to AA | 2025-12-12 | 2025 Katie Ledecky Invitational venue |
| 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 | 2025-11-23 | 2025 MR QNS Protect Ya Turkey Neck Invite venue |
| 100 Breaststroke | SCY | 1:31.69 | A+4.00s to AA | 2025-10-25 | 2025 MR QNS Can I Kick It Invitational venue |
| 25 Butterfly | SCY | 18.65 | 2023-10-28 | 2023 MR QNS Can I Kick It SCY Invitational | |
| 50 Butterfly | SCY | 31.97 | AAA+1.18s to AAAA | 2026-03-15 | 2026 MR SC Junior Metropolitan Championships venue |
| 100 Butterfly | SCY | 1:12.82 | AAA+2.83s to AAAA | 2026-03-14 | 2026 MR SC Junior Metropolitan Championships venue |
| 100 Individual Medley | SCY | 1:15.11 | AA+1.92s to AAA | 2026-03-14 | 2026 MR SC Junior Metropolitan Championships venue |
| 200 Individual Medley | SCY | 2:39.76 | AA+1.37s to AAA | 2025-12-13 | 2025 Katie Ledecky Invitational venue |
| 25 Freestyle | SCM | 22.65 | 2023-06-04 | 2023 MR FREE SCM Summer Splash Invite venue | |
| 50 Freestyle | SCM | 50.70 | +8.31s to B | 2023-06-03 | 2023 MR FREE SCM Summer Splash Invite venue |
| 25 Backstroke | SCM | 29.72 | 2023-06-03 | 2023 MR FREE SCM Summer Splash Invite venue | |
| 25 Breaststroke | SCM | 37.65 | 2023-06-03 | 2023 MR FREE SCM Summer Splash Invite venue | |
| 25 Butterfly | SCM | 23.33 | 2023-06-04 | 2023 MR FREE SCM Summer Splash Invite venue | |
| 100 Individual Medley | SCM | 2:13.72 | +23.43s to B | 2023-06-04 | 2023 MR FREE SCM Summer Splash Invite venue |
| 50 Freestyle | LCM | 34.24 | AA+1.25s to AAA | 2026-05-31 | 2026 MR SSC A-May-Zing Races Invitational venue |
| 100 Freestyle | LCM | 1:16.27 | AA+2.98s to AAA | 2026-05-30 | 2026 MR SSC A-May-Zing Races Invitational venue |
| 200 Freestyle | LCM | 2:52.82 | A+6.43s to AA | 2026-01-01 | qns 25april2026 |
| 50 Backstroke | LCM | 43.27 | BB+0.18s to A | 2026-04-26 | MR QNS 2026 It's Spring Again LCM Invite venue |
| 100 Backstroke | LCM | 1:28.00 | AA+3.91s to AAA | 2026-05-10 | 2026 MR LIE May Extravaganza Invitational venue |
| 50 Breaststroke | LCM | 46.26 | A+0.47s to AA | 2026-05-10 | 2026 MR LIE May Extravaganza Invitational venue |
| 50 Butterfly | LCM | 35.37 | AAA+0.68s to AAAA | 2026-04-26 | MR QNS 2026 It's Spring Again LCM Invite venue |
| 100 Butterfly | LCM | 1:24.37 | AAA+4.78s to AAAA | 2026-05-31 | 2026 MR SSC A-May-Zing Races Invitational venue |
| 200 Individual Medley | LCM | 3:33.31 | BB+15.02s to A | 2024-07-06 | 2024 MR QNS One More Chance LCM Invite venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 10.
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 |
| 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 | 37.13 | flying | 200 Free Relay (leg 4) | 2024-07-20 | 2024 Metropolitan LC Junior Met Championships |
| 100 Freestyle | LCM | 1:22.78 | flying | 400 Free Relay (leg 2) | 2024-07-21 | 2024 Metropolitan LC Junior Met Championships |
| 50 Butterfly | LCM | 49.47 | flying | 200 Medley Relay (leg 3) | 2024-07-21 | 2024 Metropolitan LC Junior Met Championships |
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 · SCY
3805 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:26.43 | 744 |
| 100 BK SCY | 1:17.51 | 705 |
| 100 BR SCY | 1:31.69 | 634 |
| 100 FL SCY | 1:12.82 | 880 |
| 200 IM SCY | 2:39.76 | 842 |
IMR 10 & under · SCY
4012 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 100 FR SCY | 1:02.08 | 934 |
| 50 BK SCY | 35.87 | 722 |
| 50 BR SCY | 41.76 | 661 |
| 50 FL SCY | 31.97 | 893 |
| 100 IM SCY | 1:15.11 | 802 |
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 1:16.27
Front half 37.05s · back half 39.22s
200 Freestyle LCM 2:52.82
Front half 84.58s · back half 88.24s
100 Backstroke LCM 1:28.00
Front half 44.27s · back half 43.73s
100 Butterfly LCM 1:24.37
Front half 40.81s · back half 43.56s
200 Individual Medley LCM 3:33.31
Front half 102.24s · back half 111.07s
Progression
Faster times are higher. One card per event, all courses & history.