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 | |
|---|---|---|---|---|---|---|---|---|---|
| 401 | Anthony Ma | 48.63 | 9 | BB Min | A: 43.09 (+5.54s | 11.4%) | Cottonwood Heights Aquatics | 06/18/2025 | 2025 UT CHAT INVITATIONAL | |
| 402 | Alexander Rich | 48.64 | 9 | BB Min | A: 43.09 (+5.55s | 11.4%) | Maverick Aquatics | 07/25/2025 | 2025 CO CSI Age Group Championships | |
| 403 | Dominic Allen | 48.64 | 8 | BB Min | A: 43.09 (+5.55s | 11.4%) | Crow Canyon Sharks | 05/25/2024 | 2024 Tiger Aquatics C B BB+ Memorial Day Meet | |
| 404 | Otto Seeber | 48.65 | 8 | BB Min | A: 43.09 (+5.56s | 11.4%) | Flatiron Athletic Club | 05/16/2025 | 2025 CO NJ Ken Kelley Invite | |
| 405 | Weston Weishaar | 48.68 | 10 | BB Min | A: 43.09 (+5.59s | 11.5%) | Skagit Valley YMCA Tritons | 07/18/2025 | 2025 PN Chinook Age Group Seattle Open | |
| 406 | Brandon Son | 48.70 | 7 | BB Min | A: 43.09 (+5.61s | 11.5%) | Columbia River Swim Team | 06/07/2025 | 2025 OR CRST Summer Blast 2 | |
| 407 | Owen Zhuang | 48.77 | 8 | BB Min | A: 43.09 (+5.68s | 11.6%) | Santa Clara Swim Club | 07/20/2024 | Alto Last Splash Invitational | |
| 408 | Vincent Kim | 48.81 | 9 | BB Min | A: 43.09 (+5.72s | 11.7%) | Hydro Aquatics Club | 06/12/2025 | 2025 CA SCS RAA June Age Group Championships | |
| 409 | Eddie Bi | 48.81 | 8 | BB Min | A: 43.09 (+5.72s | 11.7%) | California Dolphins Swim Team | 04/12/2025 | PC BSW LCM C B BB+ Meet | |
| 410 | Jamie Pan | 48.81 | 9 | BB Min | A: 43.09 (+5.72s | 11.7%) | Alto Swim Club | 04/19/2025 | Alto Spring Jam Meet | |
| 411 | Orion Blue-Smith | 48.82 | 9 | BB Min | A: 43.09 (+5.73s | 11.7%) | Palo Alto Stanford Aquatics | 06/06/2025 | BAC C B A Meet | |
| 412 | Blaze Garcia | 48.83 | 9 | BB Min | A: 43.09 (+5.74s | 11.8%) | Pueblo County Swim Team | 06/19/2025 | 2025 CO Grand Junction Invitational | |
| 413 | Demian Jarmy | 48.84 | 9 | BB Min | A: 43.09 (+5.75s | 11.8%) | Pleasanton Seahawks | 05/24/2025 | 2025 Tiger Aquatics C B BB+ Memorial Day Meet | |
| 414 | Niranjan Bharathan | 48.85 | 9 | BB Min | A: 43.09 (+5.76s | 11.8%) | Tualatin Hills Swim Club | 06/06/2025 | 2025 THSC June Invitational | |
| 415 | Leo Liao | 48.86 | 9 | BB Min | A: 43.09 (+5.77s | 11.8%) | Alto Swim Club | 04/19/2025 | Alto Spring Jam Meet | |
| 416 | Cole King-thomas | 48.87 | 9 | BB Min | A: 43.09 (+5.78s | 11.8%) | Sonoma Sea Dragons | 06/22/2024 | NVST S LAST CHANCE JO SUMMER PLUNGE | |
| 417 | Declan Sederholm | 48.87 | 9 | BB Min | A: 43.09 (+5.78s | 11.8%) | Hilltop Aquatic Swim Team | 06/21/2025 | 2025 UT HAST RWB Invitational | |
| 418 | Chayton Zhou | 48.87 | 8 | BB Min | A: 43.09 (+5.78s | 11.8%) | Pleasanton Seahawks | 04/12/2025 | PC BSW LCM C B BB+ Meet | |
| 419 | Joshua Chen | 48.89 | 10 | BB Min | A: 43.09 (+5.80s | 11.9%) | Bellevue Club Swim Team | 05/02/2025 | 2025 PN BC May Flowers | |
| 420 | Zachary Everett | 48.89 | 10 | BB Min | A: 43.09 (+5.80s | 11.9%) | Seals Aquatics | 05/30/2025 | VJO S Tuffy Williams Summer Kickoff Classic | |
| 421 | Augustus Pape | 48.94 | 10 | BB Min | A: 43.09 (+5.85s | 12.0%) | Sparks Piranhas Swim Team | 06/20/2025 | Reno Aquatic Club Gamble | |
| 422 | Rain Liu | 48.96 | 9 | BB Min | A: 43.09 (+5.87s | 12.0%) | Rancho San Dieguito | 07/11/2025 | 2025 SI SDSA All Ages NTS Meet | |
| 423 | Charles Knigge | 48.96 | 9 | BB Min | A: 43.09 (+5.87s | 12.0%) | Spokane Waves Aquatic Team | 06/06/2025 | 2025 TRI CITY INVITATIONAL | |
| 424 | Bradley Royce | 48.98 | 9 | BB Min | A: 43.09 (+5.89s | 12.0%) | Highlands Ranch Aquatics | 07/25/2025 | 2025 CO CSI Age Group Championships | |
| 425 | Arick Yuan | 49.00 | 9 | BB Min | A: 43.09 (+5.91s | 12.1%) | Santa Clara Swim Club | 06/27/2025 | Valley Splash | |
| 426 | Liam Lawson | 49.02 | 9 | BB Min | A: 43.09 (+5.93s | 12.1%) | Lake Oswego Swim Club | 07/12/2025 | 2025 OSI Arena Summer LC 10 U Championships | |
| 427 | Joshua Vitale | 49.04 | 9 | BB Min | A: 43.09 (+5.95s | 12.1%) | Lake Oswego Swim Club | 06/26/2025 | 2025 Howard Jones Open | |
| 428 | Isaac Marcuson | 49.08 | 9 | BB Min | A: 43.09 (+5.99s | 12.2%) | Aspire Aquatics of Colorado | 07/25/2025 | 2025 CO CSI Age Group Championships | |
| 429 | Zachary Allred | 49.09 | 10 | BB Min | A: 43.09 (+6.00s | 12.2%) | Fog City Hammerheads | 06/27/2025 | Silicon Valley LC CBA+ Meet | |
| 430 | Mateo Sison | 49.10 | 9 | BB Min | A: 43.09 (+6.01s | 12.2%) | San Ramon Valley Aquatics | 06/07/2025 | Orinda Aquatics LC C B BB+ Meet | |
| 431 | Alan Li | 49.12 | 10 | BB Min | A: 43.09 (+6.03s | 12.3%) | Tualatin Hills Swim Club | 06/06/2025 | 2025 THSC June Invitational | |
| 432 | Yunus Mukhamadieva | 49.16 | 9 | BB Min | A: 43.09 (+6.07s | 12.3%) | Brentwood Seawolves | 06/07/2025 | Orinda Aquatics LC C B BB+ Meet | |
| 433 | Roman Tsikalov | 49.17 | 9 | BB Min | A: 43.09 (+6.08s | 12.4%) | Otter Swim Club | 06/06/2025 | 2025 DACA LC CBA+ Meet | |
| 434 | Caleb McGovern | 49.23 | 10 | BB Min | A: 43.09 (+6.14s | 12.5%) | Portland Aquatic Club | 11/14/2025 | GACC PAC 12 U Sprint Dual | |
| 435 | Everett Philipps | 49.25 | 10 | BB Min | A: 43.09 (+6.16s | 12.5%) | Issaquah Swim Team | 07/18/2025 | 2025 PN Chinook Age Group Seattle Open | |
| 436 | Emmett Curry | 49.26 | 9 | BB Min | A: 43.09 (+6.17s | 12.5%) | Seattle Metropolitan Aquatic C | 05/16/2025 | 2025 PN IST Sockeye Springtime Madness | |
| 437 | Thomas Cooke | 49.27 | 8 | BB Min | A: 43.09 (+6.18s | 12.5%) | Aptos Cabrillo Swim Club | 06/27/2025 | Valley Splash | |
| 438 | Sebastian Hartline | 49.28 | 9 | BB Min | A: 43.09 (+6.19s | 12.6%) | Multnomah Athletic Club | 05/02/2025 | 2025 THSC Spring Invitational | |
| 439 | Alexander Rao | 49.29 | 10 | BB Min | A: 43.09 (+6.20s | 12.6%) | Eastside Aquatic Swim Team | 06/14/2025 | 2025 IST June Invtational | |
| 440 | Wilder Toohey | 49.33 | 10 | B Min | BB: 49.29 (+0.04s | 0.1%) | La Grande Swim Club | 07/05/2025 | Pendleton Open 2025 | |
| 441 | Theodore Gerber | 49.42 | 10 | B Min | BB: 49.29 (+0.13s | 0.3%) | Wave Aquatics | 07/24/2025 | 2025 PN LC 12 U Championships | |
| 442 | Vincent Salameh | 49.44 | 10 | B Min | BB: 49.29 (+0.15s | 0.3%) | Stingray Swim Team | 05/29/2025 | 2025 IE VS Apple Capital | |
| 443 | Milo Gordon | 49.45 | 8 | B Min | BB: 49.29 (+0.16s | 0.3%) | Flatiron Athletic Club | 06/06/2025 | 2025 CO NJ Summer Solstice Invitational | |
| 444 | Luke Cheng | 49.45 | 9 | B Min | BB: 49.29 (+0.16s | 0.3%) | Otter Swim Club | 04/19/2025 | Alto Spring Jam Meet | |
| 445 | Landon Callaway | 49.49 | 10 | B Min | BB: 49.29 (+0.20s | 0.4%) | Aces Swim Club | 06/19/2025 | 2025 CO ACES Summer Invite | |
| 446 | Milo Lanigan | 49.50 | 9 | B Min | BB: 49.29 (+0.21s | 0.4%) | Pikes Peak Athletics | 04/26/2025 | 2025 CO FST Spring LC Fever | |
| 447 | Luke Chaikriangkrai | 49.54 | 8 | B Min | BB: 49.29 (+0.25s | 0.5%) | Pro Swimming | 05/16/2025 | 2025 PN IST Sockeye Springtime Madness | |
| 448 | Russell George | 49.55 | 10 | B Min | BB: 49.29 (+0.26s | 0.5%) | Lakeridge Swim Team | 06/20/2025 | Reno Aquatic Club Gamble | |
| 449 | John Griswold | 49.56 | 10 | B Min | BB: 49.29 (+0.27s | 0.5%) | Alameda Gators | 06/20/2025 | Zone 2 Last Chance To AG Champs | |
| 450 | Nicholas Harrold | 49.56 | 9 | B Min | BB: 49.29 (+0.27s | 0.5%) | Pikes Peak Athletics | 07/25/2025 | 2025 CO CSI Age Group Championships | |
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.