Pacific Swimming Boys 10 & under - 50 Y Back
These rankings show the swimmers' placement within their Local Swimming Committee (LSC).They are based on the swimmer's personal best, their current age category, and team; and are calculated from all the meets results.
For each swimmer, you can find the swimmer's ranking, their best time, the corresponding time standard, as well as how much faster the swimmer needs to be to reach the next level. The last columns provide information about the event they achieved this personal best.
Swimmer Rankings
| Ranking | Name | Time | Age | Standard | to Next Standard | Team | Date | Meet | |
|---|---|---|---|---|---|---|---|---|---|
| 351 | Woohyun Kim | 46.76 | 8 | B Min | BB: 42.89 (+3.87s | 8.3%) | Santa Clara Swim Club | 11/14/2025 | 2025 Santa Clara Swim Club SC CBA Meet | |
| 352 | Bruce Zhang | 46.78 | 9 | B Min | BB: 42.89 (+3.89s | 8.3%) | Alto Swim Club | 02/07/2026 | Alto Feb 7 8 CBA Valentines Day | |
| 353 | Aaron Lee | 46.80 | 10 | B Min | BB: 42.89 (+3.91s | 8.4%) | Alto Swim Club | 03/07/2026 | DACA CBA Meet | |
| 354 | Robert Kolesnik | 46.80 | 10 | B Min | BB: 42.89 (+3.91s | 8.4%) | Bulldog Swim Club | 03/07/2026 | BAC Race To AGCs | |
| 355 | Kevin Zhang | 46.84 | 9 | B Min | BB: 42.89 (+3.95s | 8.4%) | Santa Clara Swim Club | 03/28/2026 | Swim South Bay | |
| 356 | Charles Zheng | 46.84 | 9 | B Min | BB: 42.89 (+3.95s | 8.4%) | California Dolphins Swim Team | 03/28/2026 | PC CDST SC C B BB+ Meet | |
| 357 | Isaac Welmerink | 46.87 | 9 | B Min | BB: 42.89 (+3.98s | 8.5%) | Lakeridge Swim Team | 02/06/2026 | 2026 Valentines Day Age Group Open | |
| 358 | Orion Boudreaux | 46.87 | 10 | B Min | BB: 42.89 (+3.98s | 8.5%) | Napa Valley Swim Team | 09/20/2025 | WANV CBA+ Endless Summer Meet | |
| 359 | Albert Yang | 46.88 | 9 | B Min | BB: 42.89 (+3.99s | 8.5%) | California Dolphins Swim Team | 03/28/2026 | PC CDST SC C B BB+ Meet | |
| 360 | Greyson Thach | 46.95 | 8 | B Min | BB: 42.89 (+4.06s | 8.6%) | Oakland Undercurrent Swim Team | 03/14/2026 | 2026 NNA AGO | |
| 361 | Aiden Hu | 47.07 | 10 | B Min | BB: 42.89 (+4.18s | 8.9%) | Alto Swim Club | 02/07/2026 | Alto Feb 7 8 CBA Valentines Day | |
| 362 | Piradon Pukrittayakamee | 47.09 | 9 | B Min | BB: 42.89 (+4.20s | 8.9%) | California Dolphins Swim Team | 03/28/2026 | PC CDST SC C B BB+ Meet | |
| 363 | John Patane | 47.09 | 8 | B Min | BB: 42.89 (+4.20s | 8.9%) | Sonoma Sea Dragons | 11/22/2025 | Thankswimming Classic 2025 | |
| 364 | Charles Li | 47.14 | 9 | B Min | BB: 42.89 (+4.25s | 9.0%) | South San Francisco Aquatics | 01/10/2026 | SSF NEW YEAR SPLASH C B A+ | |
| 365 | Minchan Lee | 47.15 | 10 | B Min | BB: 42.89 (+4.26s | 9.0%) | Reno Aquatic Club | 03/14/2026 | 2026 NNA AGO | |
| 366 | Evan Kim | 47.21 | 10 | B Min | BB: 42.89 (+4.32s | 9.2%) | Sunnyvale Swim Club | 03/28/2026 | LAMV C B A+ Meet | |
| 367 | Mason Cao | 47.22 | 10 | B Min | BB: 42.89 (+4.33s | 9.2%) | Santa Clara Swim Club | 10/04/2024 | SCSC Pacific Swimming Short Cours C B A+ Meet | |
| 368 | James Xiao | 47.24 | 9 | B Min | BB: 42.89 (+4.35s | 9.2%) | Otter Swim Club | 03/07/2026 | 2026 PASA Last Chance For JO S | |
| 369 | Reyansh Kini | 47.25 | 10 | B Min | BB: 42.89 (+4.36s | 9.2%) | San Ramon Valley Aquatics | 10/18/2025 | PC SRVA SCY B BB+ Meet | |
| 370 | Reid Barylski | 47.31 | 10 | B Min | BB: 42.89 (+4.42s | 9.3%) | Neptune Swimming | 07/26/2025 | 2025 REAL Championships | |
| 371 | Landon Thomassian | 47.34 | 9 | B Min | BB: 42.89 (+4.45s | 9.4%) | Almaden Riptide | 10/25/2025 | GGST Spooktacular 2025 | |
| 372 | Zaddik Fan | 47.35 | 10 | B Min | BB: 42.89 (+4.46s | 9.4%) | Alto Swim Club | 03/28/2026 | Alto Rock The Blocks Invitational 2026 | |
| 373 | Julian Zhang | 47.38 | 10 | B Min | BB: 42.89 (+4.49s | 9.5%) | DeAnza Cupertino Aquatics | 10/11/2025 | 2025 DACA SC CBA Meet | |
| 374 | Benjamin Du | 47.39 | 10 | B Min | BB: 42.89 (+4.50s | 9.5%) | Santa Clara Swim Club | 11/14/2025 | 2025 Santa Clara Swim Club SC CBA Meet | |
| 375 | Oliver Asiri | 47.39 | 9 | B Min | BB: 42.89 (+4.50s | 9.5%) | Seals Aquatics | 03/07/2026 | Napa Valley Swim Team Swimming Towards Spring | |
| 376 | Julian Kau | 47.44 | 10 | B Min | BB: 42.89 (+4.55s | 9.6%) | Palo Alto Stanford Aquatics | 03/07/2026 | 2026 PASA Last Chance For JO S | |
| 377 | Kayvan Tabarrok | 47.45 | 9 | B Min | BB: 42.89 (+4.56s | 9.6%) | Piedmont Swim Team | 03/28/2026 | Piedmont Swim Team C B BB+ | |
| 378 | Elliott Poe Brown | 47.48 | 8 | B Min | BB: 42.89 (+4.59s | 9.7%) | Burlingame Aquatics | 03/07/2026 | BAC Race To AGCs | |
| 379 | Miles Tseung | 47.50 | 10 | B Min | BB: 42.89 (+4.61s | 9.7%) | San Ramon Valley Aquatics | 03/28/2026 | Albany Armada Aquatics SC C B BB+ | |
| 380 | Marcus Zhu | 47.53 | 10 | B Min | BB: 42.89 (+4.64s | 9.8%) | Quicksilver Swimming | 01/16/2026 | 2026 Brian Malick Memorial Z1S Championships | |
| 381 | Dohjin Park | 47.53 | 9 | B Min | BB: 42.89 (+4.64s | 9.8%) | Los Gatos Swim Club | 12/05/2025 | Zone 1S Year End Age Group Champs Minus Meet | |
| 382 | Barron Vellonen | 47.54 | 10 | B Min | BB: 42.89 (+4.65s | 9.8%) | Monterey Bay Swim Club | 11/14/2025 | 2025 Santa Clara Swim Club SC CBA Meet | |
| 383 | Santiago Westbury | 47.57 | 10 | B Min | BB: 42.89 (+4.68s | 9.8%) | Piedmont Swim Team | 03/28/2026 | Piedmont Swim Team C B BB+ | |
| 384 | Sam Zhang | 47.60 | 8 | B Min | BB: 42.89 (+4.71s | 9.9%) | Otter Swim Club | 03/28/2026 | LAMV C B A+ Meet | |
| 385 | Adam Alkhayru | 47.65 | 9 | B Min | BB: 42.89 (+4.76s | 10.0%) | Reno Aquatic Club | 01/16/2026 | 2026 Blizzard Blast Swim Meet | |
| 386 | Kunal Agarwal | 47.69 | 10 | B Min | BB: 42.89 (+4.80s | 10.1%) | California Dolphins Swim Team | 11/14/2025 | 2025 Santa Clara Swim Club SC CBA Meet | |
| 387 | Colin Hunger | 47.72 | 9 | B Min | BB: 42.89 (+4.83s | 10.1%) | Piranha Swimming | 12/13/2025 | SDAT Winter Pentathlon | |
| 388 | Marlon Chinchilla | 47.77 | 9 | B Min | BB: 42.89 (+4.88s | 10.2%) | Piranha Swimming | 02/28/2026 | VJO Rep The Bay C B A+ 2026 Copied | |
| 389 | David Tan | 47.77 | 9 | B Min | BB: 42.89 (+4.88s | 10.2%) | Pacifica Sea Lions | 12/06/2025 | DCD Winter Holiday Splash CBA+ | |
| 390 | Bodhi Barefoot | 47.79 | 10 | B Min | BB: 42.89 (+4.90s | 10.3%) | Mendocino Coast Sea Dragons | 11/22/2025 | Thankswimming Classic 2025 | |
| 391 | Arthur Viray | 47.79 | 9 | B Min | BB: 42.89 (+4.90s | 10.3%) | Daly City Dolphins | 03/28/2026 | PSL March CBA+ | |
| 392 | Henry Huang | 47.79 | 9 | B Min | BB: 42.89 (+4.90s | 10.3%) | Daly City Dolphins | 02/07/2026 | 2026 PSL Super Finals Invitational | |
| 393 | Derek Feng | 47.81 | 10 | B Min | BB: 42.89 (+4.92s | 10.3%) | San Ramon Valley Aquatics | 03/22/2025 | 2025 3 22 CDST SC C B BB+ Meet | |
| 394 | Griffin Arroyo | 47.94 | 8 | B Min | BB: 42.89 (+5.05s | 10.5%) | Walnut Creek Aquabears | 10/18/2025 | PC SRVA SCY B BB+ Meet | |
| 395 | Carter Vizcarra | 47.95 | 9 | B Min | BB: 42.89 (+5.06s | 10.6%) | Neptune Swimming | 09/27/2024 | Neptune Swimming Fall Classic | |
| 396 | Max Bookstein | 47.96 | 10 | B Min | BB: 42.89 (+5.07s | 10.6%) | Alto Swim Club | 03/07/2026 | DACA CBA Meet | |
| 397 | Maximilian Kuo | 48.02 | 7 | B Min | BB: 42.89 (+5.13s | 10.7%) | California Dolphins Swim Team | 11/08/2025 | Albany Armada Aquatics C B BB+ Meet | |
| 398 | Alex Zhong | 48.03 | 8 | B Min | BB: 42.89 (+5.14s | 10.7%) | Santa Clara Swim Club | 06/14/2025 | SCSC Blue Gold Block Party Meet June | |
| 399 | Andy Yu | 48.03 | 9 | B Min | BB: 42.89 (+5.14s | 10.7%) | Burlingame Aquatics | 03/07/2026 | BAC Race To AGCs | |
| 400 | John Cosgrove | 48.08 | 9 | B Min | BB: 42.89 (+5.19s | 10.8%) | Sonoma Sea Dragons | 01/31/2026 | 2026 Peggy Ramirez Memorial Z3 Winter Champs | |
Disclaimer: This Website is not affiliated with USA Swimming or any Local Swim Committee. The rankings and times displayed on this website are unofficial and should not be viewed as such. We update our information regularly, but we cannot guarantee that the data is accurate, timely, or complete. The only purpose of this website is entertainment. None of the information here should be used for university admission applications.