Western Zone Zone Boys 10 & under - 50 M 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 | Kaleb Luu | 44.86 | 9 | BB Min | A: 43.09 (+1.77s | 3.9%) | Pleasanton Seahawks | 06/20/2026 | Alto Summer Swelter | |
| 352 | Maxwell Rosensweet | 44.86 | 10 | BB Min | A: 43.09 (+1.77s | 3.9%) | Bay Club Aquatics | 06/19/2026 | 2026 SI Splash And Dash | |
| 353 | Oliver Pearce | 44.89 | 10 | BB Min | A: 43.09 (+1.80s | 4.0%) | Aces Swim Club | 07/25/2025 | 2025 CO CSI Age Group Championships | |
| 354 | Samuel Diemert | 44.91 | 9 | BB Min | A: 43.09 (+1.82s | 4.1%) | Mission Aurora Colorado Swimmi | 04/12/2026 | 2026 CO NJ SBL Pentathlon 12 U | |
| 355 | Dominik Orlov | 44.92 | 10 | BB Min | A: 43.09 (+1.83s | 4.1%) | Avon Swim Club | 07/24/2026 | 2026 CO Age Group LCM State Championships | |
| 356 | Nicholas Harrold | 44.92 | 10 | BB Min | A: 43.09 (+1.83s | 4.1%) | Pikes Peak Athletics | 05/16/2026 | 2026 CO Hilltopper Invite | |
| 357 | Zuriel Cariazo | 44.94 | 10 | BB Min | A: 43.09 (+1.85s | 4.1%) | Montrose Marlins Swim Club | 07/10/2026 | 2026 CO Western Slope League Championships | |
| 358 | Luke Wang | 44.97 | 10 | BB Min | A: 43.09 (+1.88s | 4.2%) | Sierra Marlins Swim Team | 05/23/2026 | 2026 Tiger Aquatics C B BB+ Memorial Day Meet | |
| 359 | Ayu Shaik | 44.99 | 10 | BB Min | A: 43.09 (+1.90s | 4.2%) | Apex | 06/05/2026 | 2026 CST Summer Invitational | |
| 360 | Brian Yu | 44.99 | 10 | BB Min | A: 43.09 (+1.90s | 4.2%) | Dare Aquatics | 06/11/2026 | ARMADA 2026 SCS June AG Invite | |
| 361 | Lucas Shan | 45.05 | 10 | BB Min | A: 43.09 (+1.96s | 4.4%) | Legacy Aquatics | 05/08/2026 | 2026 NE CRA MIT Team Specialty LC Meet | |
| 362 | Avyan Bajpai | 45.06 | 10 | BB Min | A: 43.09 (+1.97s | 4.4%) | Hillsboro Swim Team | 07/10/2026 | 2026 OSI Arena Summer LC 12 U Championships | |
| 363 | Billy XU | 45.10 | 9 | BB Min | A: 43.09 (+2.01s | 4.5%) | Brea Aquatics | 07/23/2026 | 2026 CA SCS Summer A G Champs @ BREA | |
| 364 | Charles Knigge | 45.11 | 10 | BB Min | A: 43.09 (+2.02s | 4.5%) | Spokane Waves Aquatic Team | 04/25/2026 | 2026 SWAT Spring Fling | |
| 365 | Ezekiel Beyer | 45.14 | 10 | BB Min | A: 43.09 (+2.05s | 4.5%) | Swim Dogs | 07/24/2026 | 2026 CO Age Group LCM State Championships | |
| 366 | Maximilian Zhou | 45.15 | 9 | BB Min | A: 43.09 (+2.06s | 4.6%) | Alto Swim Club | 07/25/2026 | Alto Last Splash | |
| 367 | Carson Yin | 45.15 | 10 | BB Min | A: 43.09 (+2.06s | 4.6%) | Tualatin Hills Swim Club | 06/12/2026 | 2026 THSC June Open | |
| 368 | Mikhail Lagzdin | 45.16 | 9 | BB Min | A: 43.09 (+2.07s | 4.6%) | Olympic Cascade Aquatics | 05/15/2026 | 2026 PN IST Sockeye Springtime Madness App | |
| 369 | Milo Lanigan | 45.16 | 10 | BB Min | A: 43.09 (+2.07s | 4.6%) | Pikes Peak Athletics | 07/24/2026 | 2026 CO Age Group LCM State Championships | |
| 370 | Jason He | 45.19 | 10 | BB Min | A: 43.09 (+2.10s | 4.6%) | Dare Aquatics | 06/11/2026 | ARMADA 2026 SCS June AG Invite | |
| 371 | Mark Shcherbakov | 45.21 | 9 | BB Min | A: 43.09 (+2.12s | 4.7%) | Calabasas Waves | 06/11/2026 | 2026 SCS June AG Invite CANY | |
| 372 | Jaafar Lahmidi | 45.23 | 10 | B: 44.49 (+0.74s | 1.6%) | Foothills Swim Team | 05/15/2026 | 2026 CO NJ Ken Kelley Invite | ||
| 373 | Zachary Iannamico | 45.27 | 10 | BB Min | A: 43.09 (+2.18s | 4.8%) | Inland Coastal Aquatic Club | 06/19/2026 | 2026 SI Splash And Dash | |
| 374 | Avi Sethna | 45.27 | 10 | BB Min | A: 43.09 (+2.18s | 4.8%) | Beach Cities Alpha | 06/11/2026 | ARMADA 2026 SCS June AG Invite | |
| 375 | Daniel Rondel | 45.27 | 9 | BB Min | A: 43.09 (+2.18s | 4.8%) | Wave Aquatics | 07/23/2026 | 2026 PN LC 12 U Championships Approved | |
| 376 | Kyle Cheung | 45.28 | 10 | BB Min | A: 43.09 (+2.19s | 4.8%) | Palo Alto Stanford Aquatics | 06/26/2026 | SUNN Silicon Valley CBA+ LCM | |
| 377 | Andrew Boyle | 45.29 | 10 | BB Min | A: 43.09 (+2.20s | 4.9%) | Rosemead Rapids | 07/23/2026 | 2026 CA SCS RAA Summer A G Champs Copied | |
| 378 | Abayan Prithviraj | 45.34 | 10 | BB Min | A: 43.09 (+2.25s | 5.0%) | Alto Swim Club | 07/25/2026 | Alto Last Splash | |
| 379 | Caleb Taussig | 45.34 | 9 | BB Min | A: 43.09 (+2.25s | 5.0%) | Denver Swim Academy | 05/16/2026 | 2026 CO Hilltopper Invite | |
| 380 | Oliver Morris | 45.34 | 9 | BB Min | A: 43.09 (+2.25s | 5.0%) | Lake Oswego Swim Club | 05/22/2026 | 2026 THSC Memorial Weekend Meet | |
| 381 | Julian Kreth | 45.34 | 8 | BB Min | A: 43.09 (+2.25s | 5.0%) | Tualatin Hills Swim Club | 05/22/2026 | 2026 THSC Memorial Weekend Meet | |
| 382 | Noah Chiu | 45.34 | 10 | BB Min | A: 43.09 (+2.25s | 5.0%) | Alto Swim Club | 06/26/2026 | SUNN Silicon Valley CBA+ LCM | |
| 383 | Sebastian Alfonso | 45.35 | 10 | BB Min | A: 43.09 (+2.26s | 5.0%) | Walnut Creek Aquabears | 06/13/2026 | Orinda PC LC AG C B BB+ | |
| 384 | Mauricio Sanmartin | 45.37 | 10 | BB Min | A: 43.09 (+2.28s | 5.0%) | Fontana Aquatics Club | 07/23/2026 | 2026 CA SCS RAA Summer A G Champs Copied | |
| 385 | Flynn Chen | 45.38 | 10 | BB Min | A: 43.09 (+2.29s | 5.0%) | DeAnza Cupertino Aquatics | 06/12/2026 | 2026 DACA LC CBA Meet | |
| 386 | Lincoln Estrella | 45.41 | 9 | BB Min | A: 43.09 (+2.32s | 5.1%) | Flatiron Athletic Club | 07/24/2026 | 2026 CO Age Group LCM State Championships | |
| 387 | Kai Kitamori | 45.41 | 10 | BB Min | A: 43.09 (+2.32s | 5.1%) | East Bay Bat Rays | 06/13/2026 | PC CDST LC C B BB+ 26 074 | |
| 388 | Rylan Brill | 45.42 | 10 | BB Min | A: 43.09 (+2.33s | 5.1%) | Colorado Stingrays Swim Team | 05/15/2026 | 2026 CO NJ Ken Kelley Invite | |
| 389 | Mark Chechuy | 45.42 | 10 | BB Min | A: 43.09 (+2.33s | 5.1%) | South Orange County Aquatics | 07/23/2026 | 2026 CA SCS Summer A G Champs | |
| 390 | Henry Fredericks | 45.43 | 9 | BB Min | A: 43.09 (+2.34s | 5.2%) | COSA Swimming | 07/24/2026 | 2026 CO Age Group LCM State Championships | |
| 391 | Jackson Porter | 45.44 | 10 | BB Min | A: 43.09 (+2.35s | 5.2%) | Stingray Swim Team | 07/23/2026 | 2026 PN LC 12 U Championships Approved | |
| 392 | Locke Kane | 45.44 | 9 | BB Min | A: 43.09 (+2.35s | 5.2%) | Lahaina Swim Club | 06/13/2026 | 2026 MAGSA LCM B 2 Meet | |
| 393 | Krosby Thomure | 45.45 | 10 | BB Min | A: 43.09 (+2.36s | 5.2%) | Spokane Waves Aquatic Team | 06/19/2026 | 2026 SWAT Summer Solstice | |
| 394 | Logan Yip | 45.48 | 10 | BB Min | A: 43.09 (+2.39s | 5.3%) | South San Francisco Aquatics | 06/26/2026 | SUNN Silicon Valley CBA+ LCM | |
| 395 | Jonathan Li | 45.51 | 8 | BB Min | A: 43.09 (+2.42s | 5.3%) | Brea Aquatics | 06/11/2026 | ARMADA 2026 SCS June AG Invite | |
| 396 | Killian Mann | 45.52 | 9 | BB Min | A: 43.09 (+2.43s | 5.3%) | Olympic Cascade Aquatics | 07/23/2026 | 2026 PN LC 12 U Championships Approved | |
| 397 | Matthew Kosov | 45.54 | 9 | BB Min | A: 43.09 (+2.45s | 5.4%) | Bay Club Aquatics | 07/23/2026 | 2026 SI LC AGE GROUP CHAMPIONSHIPS | |
| 398 | Kyle Tang | 45.55 | 9 | BB Min | A: 43.09 (+2.46s | 5.4%) | Aquazot Swim Club | 07/23/2026 | 2026 CA SCS Summer A G Champs | |
| 399 | Leo Ioffe | 45.59 | 10 | BB Min | A: 43.09 (+2.50s | 5.5%) | Santa Clara Swim Club | 05/22/2026 | 2026 Zone 1 South Firecracker 400 | |
| 400 | Silvio Leal | 45.61 | 10 | BB Min | A: 43.09 (+2.52s | 5.5%) | Maui Swim Club | 05/02/2026 | 2026 MAGSA LCM B 1 Meet | |
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.