Western Zone Zone Boys 10 & under - 50 Y Back
These rankings show the swimmers' placement within their Zone.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 | Bennett Peiffer | 39.94 | 10 | BB Min | A: 37.59 (+2.35s | 5.9%) | Pacific Piranha Swim Team | 01/31/2026 | 2026 PN BISC Bluefin Invitational | |
| 352 | Hudson Porter | 39.94 | 10 | BB Min | A: 37.59 (+2.35s | 5.9%) | Wave Aquatics | 03/28/2026 | 2026 PN Spring Showdown, Div 4 Approved | |
| 353 | Calvin Larkin | 39.96 | 9 | BB Min | A: 37.59 (+2.37s | 5.9%) | Bend Swim Club | 02/21/2026 | 2026 Arena Short Course 10 U Championships | |
| 354 | Noah Chiu | 39.96 | 10 | BB Min | A: 37.59 (+2.37s | 5.9%) | Alto Swim Club | 02/07/2026 | Alto Feb 7 8 CBA Valentines Day | |
| 355 | Jaafar Lahmidi | 39.96 | 10 | BB Min | A: 37.59 (+2.37s | 5.9%) | Foothills Swim Team | 01/16/2026 | 2026 CO CUDA Classic | |
| 356 | Owen Matarazzo | 39.98 | 10 | BB Min | A: 37.59 (+2.39s | 6.0%) | The Spartans of La Canada | 12/12/2025 | 2025 CA SCS RAA WAG | |
| 357 | David Chen | 39.98 | 10 | BB Min | A: 37.59 (+2.39s | 6.0%) | Tualatin Hills Swim Club | 05/16/2026 | 2026 John DeRoest Sextathlon Swim Meet | |
| 358 | Channing Pepper | 39.98 | 10 | BB Min | A: 37.59 (+2.39s | 6.0%) | Seals Aquatics | 03/07/2026 | Napa Valley Swim Team Swimming Towards Spring | |
| 359 | Thomas Kyung | 40.00 | 8 | BB Min | A: 37.59 (+2.41s | 6.0%) | Maywood Sparks Swim Team | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 360 | James Foster | 40.01 | 10 | BB Min | A: 37.59 (+2.42s | 6.0%) | Aquawolves Swimming | 02/14/2026 | 2026 CO AQUA February Home Meet | |
| 361 | Marco Gonzalez | 40.01 | 10 | BB Min | A: 37.59 (+2.42s | 6.0%) | South Bay Aquatics | 11/21/2025 | 2025 CA MVN Turkey Classic | |
| 362 | Vincent Nan | 40.03 | 10 | BB Min | A: 37.59 (+2.44s | 6.1%) | Pacific Dragons Swim Team | 01/24/2026 | 2026 PN PDST Winter Invitational Meet Approv | |
| 363 | Andrei Sanchez | 40.04 | 10 | BB Min | A: 37.59 (+2.45s | 6.1%) | Island Aquatics | 02/26/2026 | 2026 HI Hawaiian Swimming SCY AGChamps | |
| 364 | Lathan Su | 40.05 | 10 | BB Min | A: 37.59 (+2.46s | 6.1%) | Tokyo-Red | 01/24/2026 | 2026 SCS Swim Festival | |
| 365 | Maddox Merz | 40.07 | 9 | BB Min | A: 37.59 (+2.48s | 6.2%) | Los Gatos Swim Club | 02/21/2026 | Pacific Swimming 10 U SCY Championship | |
| 366 | George Gray | 40.08 | 10 | BB Min | A: 37.59 (+2.49s | 6.2%) | Portland Aquatic Club | 02/21/2026 | 2026 Arena Short Course 10 U Championships | |
| 367 | Sanders Ford | 40.08 | 9 | BB Min | A: 37.59 (+2.49s | 6.2%) | Las Cruces Aquatic Team | 01/23/2026 | 2026 BD JCAT IMX 2026 | |
| 368 | Declan Sederholm | 40.09 | 10 | BB Min | A: 37.59 (+2.50s | 6.2%) | Hilltop Aquatic Swim Team | 03/05/2025 | 2025 Short Course UTAGS Championships | |
| 369 | Kai Kitamori | 40.10 | 10 | BB Min | A: 37.59 (+2.51s | 6.3%) | East Bay Bat Rays | 05/17/2026 | Montclair 14 Under Short Course Pentathlon | |
| 370 | Mikail Adlinsyah | 40.10 | 10 | BB Min | A: 37.59 (+2.51s | 6.3%) | Swim Excellence Academy | 08/08/2026 | 2026 SI CAST All Ages August Wrap Up Meet C | |
| 371 | Chance Tan Nelson | 40.14 | 9 | BB Min | A: 37.59 (+2.55s | 6.4%) | Olympic Cascade Aquatics | 02/27/2026 | 2026 PN February AGI, Div 3 Approved | |
| 372 | Chance Tan Nelson | 40.14 | 10 | BB Min | A: 37.59 (+2.55s | 6.4%) | West Coast Aquatics | 02/27/2026 | 2026 PN Feb Age Group Invite,Div 3 Approved | |
| 373 | Malik Basic | 40.14 | 9 | BB Min | A: 37.59 (+2.55s | 6.4%) | Olympus Aquatics | 12/29/2025 | 60th Kearns Holiday Open Invitational | |
| 374 | Alfie Mobbs | 40.15 | 10 | BB Min | A: 37.59 (+2.56s | 6.4%) | Lake Oswego Swim Club | 01/16/2026 | 2026 THSC 14 U Winter Showcase | |
| 375 | Daniel Nagaoka | 40.15 | 10 | BB Min | A: 37.59 (+2.56s | 6.4%) | Quicksilver Swimming | 02/07/2026 | Valley Splash Short Course C B A Meet | |
| 376 | Mark Chechuy | 40.18 | 10 | BB Min | A: 37.59 (+2.59s | 6.4%) | South Orange County Aquatics | 11/21/2025 | 2025 CA MVN Turkey Classic | |
| 377 | Ryden Ciammaichella | 40.19 | 9 | BB Min | A: 37.59 (+2.60s | 6.5%) | Piedmont Swim Team | 07/10/2026 | Redwood Empire Swim League Championship | |
| 378 | Shuyi Tan | 40.19 | 9 | BB Min | A: 37.59 (+2.60s | 6.5%) | Issaquah Swim Team | 03/28/2026 | 2026 PN Spring Showdown, Div1 Approved | |
| 379 | Chinmay Joshi | 40.19 | 9 | BB Min | A: 37.59 (+2.60s | 6.5%) | Quicksilver Swimming | 02/21/2026 | Pacific Swimming 10 U SCY Championship | |
| 380 | Jimmy Chen | 40.22 | 9 | BB Min | A: 37.59 (+2.63s | 6.5%) | Monterey Park Manta Rays | 12/12/2025 | 2025 CA SCS RAA WAG | |
| 381 | Abir Patowary | 40.22 | 10 | BB Min | A: 37.59 (+2.63s | 6.5%) | Excel Aquatics | 02/21/2026 | 2026 SES Region 1 8 And Under Championships | |
| 382 | Ryan Murray | 40.22 | 9 | BB Min | A: 37.59 (+2.63s | 6.5%) | Denver Swim Academy | 03/07/2025 | 2025 CO CSI Silver State Championships | |
| 383 | Arlo Holland | 40.23 | 10 | BB Min | A: 37.59 (+2.64s | 6.6%) | Excel Aquatics | 03/28/2026 | 2026 PN Spring Showdown, Div 3 Approved | |
| 384 | Oliver Morris | 40.23 | 9 | BB Min | A: 37.59 (+2.64s | 6.6%) | Lake Oswego Swim Club | 01/02/2026 | 2026 CST Shark Chase Invitational | |
| 385 | Maxwell Rosensweet | 40.23 | 10 | BB Min | A: 37.59 (+2.64s | 6.6%) | Bay Club Aquatics | 03/06/2026 | 2026 SI 14U AGE GRP CHAMPIONSHIPS | |
| 386 | Jake McNair | 40.24 | 9 | BB Min | A: 37.59 (+2.65s | 6.6%) | Bellevue Club Swim Team | 02/27/2026 | 2026 PN February AGI, Div 3 Approved | |
| 387 | Ico Tamayo | 40.25 | 9 | BB Min | A: 37.59 (+2.66s | 6.6%) | Cali Piranha Swim Team | 04/11/2026 | 2026 SI FAST BC All Ages | |
| 388 | Kian Bryson | 40.25 | 10 | BB Min | A: 37.59 (+2.66s | 6.6%) | Lake Oswego Swim Club | 10/18/2025 | 2025 LOSC October Intrasquad | |
| 389 | Charlie Chung | 40.26 | 9 | BB Min | A: 37.59 (+2.67s | 6.6%) | Trident Swim Club | 12/12/2025 | 2025 CA GWSC Winter Age Group Invitational | |
| 390 | William Frohnen | 40.29 | 9 | BB Min | A: 37.59 (+2.70s | 6.7%) | San Ramon Valley Aquatics | 07/25/2026 | Zone 2 Summer Championships | |
| 391 | Matthew Kosov | 40.29 | 9 | BB Min | A: 37.59 (+2.70s | 6.7%) | Bay Club Aquatics | 02/21/2026 | 2026 SI JBST Age Group Champs Max | |
| 392 | Kais Esmail | 40.30 | 10 | BB Min | A: 37.59 (+2.71s | 6.7%) | Bellingham Bay Swim Team | 03/06/2026 | 2026 BBST Seize The Day Invitational | |
| 393 | Luke Wang | 40.30 | 9 | BB Min | A: 37.59 (+2.71s | 6.7%) | Flatiron Athletic Club | 01/09/2026 | 2026 CO NJ Narwhal Invitational | |
| 394 | Elias Lien | 40.31 | 8 | BB Min | A: 37.59 (+2.72s | 6.7%) | Santa Clara Swim Club | 09/27/2025 | 2025 MAC Season Kick Off | |
| 395 | William Jiang | 40.32 | 8 | BB Min | A: 37.59 (+2.73s | 6.8%) | Irvine Novaquatics | 12/12/2025 | 2025 CA SCS SCAT WAG | |
| 396 | James Covey | 40.32 | 7 | BB Min | A: 37.59 (+2.73s | 6.8%) | Bellevue Club Swim Team | 03/28/2026 | 2026 PN Spring Showdown, Div1 Approved | |
| 397 | Emerson Wescott | 40.35 | 10 | BB Min | A: 37.59 (+2.76s | 6.8%) | Stingray Swim Team | 05/15/2026 | 2026 PN SRST Pacific Coast Invitational App | |
| 398 | Wylee Towner-DeMoe | 40.35 | 10 | BB Min | A: 37.59 (+2.76s | 6.8%) | Team Eugene Aquatics | 08/01/2026 | 2026 Mallard Nation Invitational | |
| 399 | Wesley Tong | 40.36 | 10 | BB Min | A: 37.59 (+2.77s | 6.9%) | Front Range Barracudas | 07/09/2026 | 2026 CO NCS 10 U Summer Festival | |
| 400 | Aiden Novin | 40.36 | 9 | BB Min | A: 37.59 (+2.77s | 6.9%) | The Claremont Club | 12/12/2025 | 2025 CA SCS RAA WAG | |
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.