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 | |
|---|---|---|---|---|---|---|---|---|---|
| 251 | Nico Pantana | 43.44 | 9 | BB Min | A: 43.09 (+0.35s | 0.8%) | Excel Aquatics | 07/17/2026 | 2026 SE Southeastern Summer LC Championships | |
| 252 | Ilay Fisher | 43.46 | 10 | BB Min | A: 43.09 (+0.37s | 0.9%) | Ccat Swimming | 07/23/2026 | 2026 CA SCS Summer A G Champs @ BREA | |
| 253 | Anderson Shi | 43.49 | 8 | BB Min | A: 43.09 (+0.40s | 0.9%) | Los Angeles Swim Club | 07/23/2026 | 2026 CA SCS Summer A G Champs @ BREA | |
| 254 | Stuart Shillington | 43.50 | 10 | BB Min | A: 43.09 (+0.41s | 0.9%) | Team Eugene Aquatics | 07/10/2026 | 2026 OSI Arena Summer LC 12 U Championships | |
| 255 | Adelynn Spurlin | 43.52 | 10 | BB Min | A: 43.09 (+0.43s | 1.0%) | North Jeffco Swim Team | 06/05/2026 | 2026 CO NJ Summer Solstice Invite | |
| 256 | Mason Li | 43.53 | 9 | BB Min | A: 43.09 (+0.44s | 1.0%) | Brea Aquatics | 06/11/2026 | ARMADA 2026 SCS June AG Invite | |
| 257 | Lucas Jiang | 43.53 | 9 | BB Min | A: 43.09 (+0.44s | 1.0%) | Santa Clara Swim Club | 05/22/2026 | 2026 Zone 1 South Firecracker 400 | |
| 258 | George Gray | 43.54 | 10 | BB Min | A: 43.09 (+0.45s | 1.0%) | Portland Aquatic Club | 07/10/2026 | 2026 OSI Arena Summer LC 12 U Championships | |
| 259 | Hantian You | 43.54 | 10 | BB Min | A: 43.09 (+0.45s | 1.0%) | Lake Oswego Swim Club | 08/01/2026 | 2026 GACC End Of Season | |
| 260 | Grigorii Vasilenko | 43.54 | 9 | BB Min | A: 43.09 (+0.45s | 1.0%) | Legacy Aquatics | 07/10/2026 | 2026 OSI Arena Summer LC 12 U Championships | |
| 261 | Maxen Cao | 43.55 | 10 | BB Min | A: 43.09 (+0.46s | 1.1%) | Otter Swim Club | 06/12/2026 | 2026 DACA LC CBA Meet | |
| 262 | Mark Kiselev | 43.56 | 9 | BB Min | A: 43.09 (+0.47s | 1.1%) | Royal Swim Team | 06/11/2026 | ARMADA 2026 SCS June AG Invite | |
| 263 | Isaac Marcuson | 43.56 | 10 | BB Min | A: 43.09 (+0.47s | 1.1%) | Aspire Aquatics of Colorado | 07/24/2026 | 2026 CO Age Group LCM State Championships | |
| 264 | Alfie Mobbs | 43.57 | 10 | BB Min | A: 43.09 (+0.48s | 1.1%) | Lake Oswego Swim Club | 05/22/2026 | 2026 THSC Memorial Weekend Meet | |
| 265 | Blaze Garcia | 43.62 | 10 | BB Min | A: 43.09 (+0.53s | 1.2%) | Pueblo County Swim Team | 07/24/2026 | 2026 CO Age Group LCM State Championships | |
| 266 | Watson She | 43.62 | 10 | BB Min | A: 43.09 (+0.53s | 1.2%) | Bellevue Club Swim Team | 07/23/2026 | 2026 PN LC 12 U Championships Approved | |
| 267 | Kais Esmail | 43.63 | 10 | BB Min | A: 43.09 (+0.54s | 1.2%) | Bellingham Bay Swim Team | 06/19/2026 | 2026 IE VS Starlight Open (USAS) | |
| 268 | Jay Kowren | 43.64 | 10 | BB Min | A: 43.09 (+0.55s | 1.3%) | Bainbridge Island Swim Club | 07/23/2026 | 2026 PN LC 12 U Championships Approved | |
| 269 | Michael Hefner | 43.68 | 9 | BB Min | A: 43.09 (+0.59s | 1.4%) | Aspen Swim Club | 07/24/2026 | 2026 CO Age Group LCM State Championships | |
| 270 | Asher Cariazo | 43.70 | 10 | BB Min | A: 43.09 (+0.61s | 1.4%) | Montrose Marlins Swim Club | 07/24/2026 | 2026 CO Age Group LCM State Championships | |
| 271 | Moses Xia | 43.71 | 10 | BB Min | A: 43.09 (+0.62s | 1.4%) | Wasc | 06/11/2026 | 2026 SCS June AG Invite | |
| 272 | Abir Patowary | 43.79 | 10 | BB Min | A: 43.09 (+0.70s | 1.6%) | Excel Aquatics | 06/04/2026 | 2026 Beaman Toyota Firecracker Invite | |
| 273 | Colin Hui | 43.83 | 10 | BB Min | A: 43.09 (+0.74s | 1.7%) | Highlands Ranch Aquatics | 06/05/2026 | 2026 CO NJ Summer Solstice Invite | |
| 274 | Emerson Wescott | 43.85 | 10 | BB Min | A: 43.09 (+0.76s | 1.7%) | Stingray Swim Team | 07/23/2026 | 2026 PN LC 12 U Championships Approved | |
| 275 | Kellan Naisbitt | 43.86 | 10 | BB Min | A: 43.09 (+0.77s | 1.8%) | Mission Viejo Nadadores | 07/23/2026 | 2026 CA SCS Summer A G Champs | |
| 276 | David Grant | 43.86 | 10 | BB Min | A: 43.09 (+0.77s | 1.8%) | Fort Collins Area Swim Team | 07/24/2026 | 2026 CO Age Group LCM State Championships | |
| 277 | Oliver Tavey | 43.87 | 9 | BB Min | A: 43.09 (+0.78s | 1.8%) | Rose Bowl Aquatics | 07/23/2026 | 2026 CA SCS Summer A G Champs @ BREA | |
| 278 | Francis Wang | 43.92 | 9 | BB Min | A: 43.09 (+0.83s | 1.9%) | West Coast Aquatics | 07/23/2026 | 2026 PN LC 12 U Championships Approved | |
| 279 | Derek Zhu | 43.93 | 10 | BB Min | A: 43.09 (+0.84s | 1.9%) | Chinook Aquatic Club | 07/23/2026 | 2026 PN LC 12 U Championships Approved | |
| 280 | Kai Mihov | 43.94 | 10 | BB Min | A: 43.09 (+0.85s | 1.9%) | Palo Alto Stanford Aquatics | 06/26/2026 | SUNN Silicon Valley CBA+ LCM | |
| 281 | Reean Shen | 43.95 | 10 | BB Min | A: 43.09 (+0.86s | 2.0%) | Pro Swimming | 07/23/2026 | 2026 PN LC 12 U Championships Approved | |
| 282 | Nathan Gordon | 43.96 | 10 | BB Min | A: 43.09 (+0.87s | 2.0%) | Irvine Novaquatics | 06/12/2025 | 2025 June Age Group Invite | |
| 283 | Luca Goulet | 43.98 | 10 | BB Min | A: 43.09 (+0.89s | 2.0%) | King Aquatic Club | 07/23/2026 | 2026 PN LC 12 U Championships Approved | |
| 284 | Haoyi Zhu | 43.99 | 9 | BB Min | A: 43.09 (+0.90s | 2.0%) | Sandpipers of Nevada | 07/23/2026 | 2026 CA SCS Summer A G Champs | |
| 285 | Adam Ellingwood | 43.99 | 10 | BB Min | A: 43.09 (+0.90s | 2.0%) | Pleasanton Seahawks | 05/23/2026 | 2026 Tiger Aquatics C B BB+ Memorial Day Meet | |
| 286 | Cole Cadiz | 44.08 | 10 | BB Min | A: 43.09 (+0.99s | 2.2%) | North Coast Aquatics | 07/23/2026 | 2026 SI LC AGE GROUP CHAMPIONSHIPS | |
| 287 | Leo Gazzard | 44.08 | 9 | BB Min | A: 43.09 (+0.99s | 2.2%) | Bellevue Club Swim Team | 05/01/2026 | 2026 PN BC May Flowers Approved | |
| 288 | Raizo Copp | 44.09 | 10 | BB Min | A: 43.09 (+1.00s | 2.3%) | King Aquatic Club | 05/15/2026 | 2026 PN IST Sockeye Springtime Madness App | |
| 289 | Noah Gaal | 44.11 | 9 | BB Min | A: 43.09 (+1.02s | 2.3%) | Aces Swim Club | 05/15/2026 | 2026 CO ACES Spring Invite | |
| 290 | Alex Tang | 44.11 | 10 | BB Min | A: 43.09 (+1.02s | 2.3%) | Aquazot Swim Club | 06/12/2025 | 2025 SCS June AG Invite @ La Mirada Armada | |
| 291 | Andreas Kwiram | 44.12 | 10 | BB Min | A: 43.09 (+1.03s | 2.3%) | Hills Hurricane Swimming | 07/17/2026 | 2026 Adam Szmidt Memorial PC Summer AG Champs | |
| 292 | Remington Jones | 44.13 | 8 | BB Min | A: 43.09 (+1.04s | 2.4%) | Sandpipers of Nevada | 06/11/2026 | ARMADA 2026 SCS June AG Invite | |
| 293 | James Tyrrell | 44.14 | 9 | BB Min | A: 43.09 (+1.05s | 2.4%) | Capital City Athletics | 05/29/2026 | 2026 CO Barracuda Summer Sizzler Invite | |
| 294 | Matthew Ko | 44.15 | 10 | BB Min | A: 43.09 (+1.06s | 2.4%) | Aspire Aquatics of Colorado | 06/26/2026 | 2026 CO Zone 2 District Meet AAC | |
| 295 | Oliver Song Zhang | 44.19 | 10 | BB Min | A: 43.09 (+1.10s | 2.5%) | West Coast Aquatics | 07/23/2026 | 2026 PN LC 12 U Championships Approved | |
| 296 | Cash Wellhoefer | 44.20 | 10 | BB Min | A: 43.09 (+1.11s | 2.5%) | Jcc Waves | 07/23/2026 | 2026 CA SCS Summer A G Champs @ BREA | |
| 297 | Wesley Lang | 44.21 | 9 | BB Min | A: 43.09 (+1.12s | 2.5%) | River Road Swim Team | 07/10/2026 | 2026 OSI Arena Summer LC 12 U Championships | |
| 298 | Jonathan Nguyen | 44.21 | 10 | BB Min | A: 43.09 (+1.12s | 2.5%) | Sandpipers of Nevada | 06/11/2026 | ARMADA 2026 SCS June AG Invite | |
| 299 | Cameron Day | 44.22 | 10 | BB Min | A: 43.09 (+1.13s | 2.6%) | Mission Viejo Nadadores | 06/11/2026 | 2026 SCS June AG Invite | |
| 300 | Easton Fairbank | 44.24 | 8 | BB Min | A: 43.09 (+1.15s | 2.6%) | Flatiron Athletic Club | 06/26/2026 | 2026 CO Zone 2 District Meet AAC | |
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.