USA Boys 10 & under - 50 M Breast
These rankings show the swimmers' placement within the United States.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 | |
|---|---|---|---|---|---|---|---|---|---|
| 301 | Lucas Guo | 52.57 | 10 | BB Min | A: 47.89 (+4.68s | 8.9%) | Santa Clara Swim Club | 05/23/2025 | Zone 1 South May Firecracker 500 | |
| 302 | Liam Kwok | 52.60 | 10 | BB Min | A: 47.89 (+4.71s | 9.0%) | Socal Aquatics Association | 06/12/2025 | 2025 CA SCS RAA June Age Group Championships | |
| 303 | Andrew Xie | 52.61 | 10 | BB Min | A: 47.89 (+4.72s | 9.0%) | Tualatin Hills Swim Club | 06/06/2025 | 2025 THSC June Invitational | |
| 304 | Yihong Xiang | 52.61 | 10 | BB Min | A: 47.89 (+4.72s | 9.0%) | Tualatin Hills Swim Club | 06/06/2025 | 2025 THSC June Invitational | |
| 305 | Jacob Liu | 52.63 | 10 | BB Min | A: 47.89 (+4.74s | 9.0%) | Trident Swim Club | 06/12/2025 | 2025 CA SCS RAA June Age Group Championships | |
| 306 | Lucius Leven | 52.64 | 10 | BB Min | A: 47.89 (+4.75s | 9.0%) | Alamo Area Aquatic Association | 06/20/2025 | 2025 ST AAAA NS George Block Invite | |
| 307 | Conner Yang | 52.64 | 10 | BB Min | A: 47.89 (+4.75s | 9.0%) | The Dolphins Portland Swimming | 07/12/2025 | 2025 OSI Arena Summer LC 10 U Championships | |
| 308 | Allister Georgiou | 52.65 | 10 | BB Min | A: 47.89 (+4.76s | 9.0%) | McGrath Marlins Swim Team | 07/11/2025 | 2025 SI SDSA All Ages NTS Meet | |
| 309 | Maxwell Dean | 52.69 | 10 | BB Min | A: 47.89 (+4.80s | 9.1%) | Voltage Aquatics | 07/19/2024 | 2024 SRS Summer Championships | |
| 310 | Saien Wu | 52.70 | 10 | BB Min | A: 47.89 (+4.81s | 9.1%) | Bellevue Club Swim Team | 07/18/2025 | 2025 PN Chinook Age Group Seattle Open | |
| 311 | Henry Bresson | 52.76 | 10 | BB Min | A: 47.89 (+4.87s | 9.2%) | Chinook Aquatic Club | 07/24/2025 | 2025 PN LC 12 U Championships | |
| 312 | Nikolas Van Halen | 52.77 | 10 | BB Min | A: 47.89 (+4.88s | 9.2%) | Swim Florida | 05/23/2025 | 2025 T2 Aquatics Norris Foundation LC Meet | |
| 313 | Titus Wu | 52.78 | 10 | BB Min | A: 47.89 (+4.89s | 9.3%) | Lynchburg YMCA Swim Team | 07/12/2024 | 2024 CCA Summer Awards | |
| 314 | Kennedy Whiting | 52.82 | 10 | BB Min | A: 47.89 (+4.93s | 9.3%) | Minnetonka Swim Club | 05/03/2025 | 2025 MN RSC Pentathlon | |
| 315 | Hunter Perfect | 52.83 | 10 | BB Min | A: 47.89 (+4.94s | 9.4%) | River Falls Swim Club | 07/23/2025 | 2025 MN NSAC 10 U LC State Championship | |
| 316 | Gregory Rucker | 52.85 | 10 | BB Min | A: 47.89 (+4.96s | 9.4%) | Firestone Akron Swim Team | 05/16/2025 | Busbey Invitational 2025 | |
| 317 | Emry Lotito | 52.85 | 9 | BB Min | A: 47.89 (+4.96s | 9.4%) | West Florida Lightning Aquatic | 04/18/2025 | 2025 SPA Spring First Long Course Meet | |
| 318 | Nicholas Medina | 52.85 | 9 | BB Min | A: 47.89 (+4.96s | 9.4%) | Laker Swim | 06/12/2025 | 2025 RAFC Summer Solstice | |
| 319 | Ezra Epstein | 52.89 | 10 | BB Min | A: 47.89 (+5.00s | 9.5%) | Asphalt Green Unified Aquatics | 08/06/2025 | 2025 Summer Elite Showcase | |
| 320 | Oliver Tadday | 52.90 | 10 | BB Min | A: 47.89 (+5.01s | 9.5%) | Gold\\\\\\'s Aquatics Club (Camas) | 11/14/2025 | GACC PAC 12 U Sprint Dual | |
| 321 | Alfie Mobbs | 52.93 | 9 | BB Min | A: 47.89 (+5.04s | 9.5%) | Lake Oswego Swim Club | 07/12/2025 | 2025 OSI Arena Summer LC 10 U Championships | |
| 322 | Peter Hofman | 52.95 | 10 | BB Min | A: 47.89 (+5.06s | 9.6%) | Cascade Swim Club | 06/20/2025 | 2025 IE VS Starlight Open | |
| 323 | Samuel Leven | 52.97 | 10 | BB Min | A: 47.89 (+5.08s | 9.6%) | Alamo Area Aquatic Association | 05/02/2025 | 2025 ST 22nd Annual Cinco De Mayo | |
| 324 | Ricardo Romero | 52.99 | 10 | BB Min | A: 47.89 (+5.10s | 9.6%) | West Valley Aquatics | 07/17/2025 | 2025 UTAGS LC Championships | |
| 325 | Ruslan Kalinnikov | 53.01 | 8 | BB Min | A: 47.89 (+5.12s | 9.7%) | Olympus Aquatics | 07/17/2025 | 2025 UTAGS LC Championships | |
| 326 | Vlad Sukharevich | 53.02 | 10 | BB Min | A: 47.89 (+5.13s | 9.7%) | Nova of Virginia | 06/27/2024 | NOVA Firecracker Classic | |
| 327 | Kroy Riley | 53.03 | 10 | BB Min | A: 47.89 (+5.14s | 9.7%) | High Performance Aquatic Club | 05/31/2025 | 2025 ST HPAC Sunshine Splash | |
| 328 | Ali Abolfadl | 53.06 | 9 | BB Min | A: 47.89 (+5.17s | 9.7%) | Olympic Cascade Aquatics | 05/16/2025 | 2025 PN IST Sockeye Springtime Madness | |
| 329 | Nolan Meinen | 53.06 | 10 | BB Min | A: 47.89 (+5.17s | 9.7%) | Nitro Swimming | 06/27/2025 | 2025 ST HPAC Long Course STX Championship | |
| 330 | Owen Friedman | 53.07 | 8 | BB Min | A: 47.89 (+5.18s | 9.8%) | Legacy Aquatics | 07/12/2025 | 2025 OSI Arena Summer LC 10 U Championships | |
| 331 | Zane Seifel | 53.07 | 10 | BB Min | A: 47.89 (+5.18s | 9.8%) | Indian River Aquatics | 06/07/2025 | 2025 TCA Aaron Vaughn Memorial | |
| 332 | Noah Mobasseri | 53.08 | 9 | BB Min | A: 47.89 (+5.19s | 9.8%) | Aquazot Swim Club | 07/24/2025 | 2025 CA SCS RAA Summer A G Champs | |
| 333 | Stryker Fonseca | 53.12 | 10 | BB Min | A: 47.89 (+5.23s | 9.8%) | Barracuda Aquatic Club | 07/17/2025 | 2025 UTAGS LC Championships | |
| 334 | Joshua Vitale | 53.12 | 10 | BB Min | A: 47.89 (+5.23s | 9.8%) | Lake Oswego Swim Club | 07/12/2025 | 2025 OSI Arena Summer LC 10 U Championships | |
| 335 | Yanbo LI | 53.13 | 9 | BB Min | A: 47.89 (+5.24s | 9.9%) | Seattle Metropolitan Aquatic C | 05/16/2025 | 2025 PN IST Sockeye Springtime Madness | |
| 336 | Reagan Wilsey | 53.15 | 10 | BB Min | A: 47.89 (+5.26s | 9.9%) | Palo Alto Stanford Aquatics | 05/17/2025 | 2025 LAMV SCM C B A+ | |
| 337 | Ethan Wang | 53.16 | 9 | BB Min | A: 47.89 (+5.27s | 9.9%) | Alto Swim Club | 04/19/2025 | Alto Spring Jam Meet | |
| 338 | Leonardo Kirk | 53.16 | 9 | BB Min | A: 47.89 (+5.27s | 9.9%) | Gator Swim Club | 03/28/2026 | EAJ Spring Into Long Course 2026 | |
| 339 | Eric Ruan | 53.16 | 9 | BB Min | A: 47.89 (+5.27s | 9.9%) | South East Metro Sharks | 07/23/2025 | 2025 MN NSAC 10 U LC State Championship | |
| 340 | Jayden Huang | 53.17 | 10 | BB Min | A: 47.89 (+5.28s | 9.9%) | Harbor Aquatics Club | 05/02/2025 | 2025 PN BC May Flowers | |
| 341 | Maksim Chichetenko | 53.17 | 8 | BB Min | A: 47.89 (+5.28s | 9.9%) | Fast Lane Aquatics | 05/16/2025 | 2025 PA Long Course Invite | |
| 342 | Marcello Rinaldi | 53.18 | 10 | BB Min | A: 47.89 (+5.29s | 9.9%) | Minnetonka Swim Club | 07/23/2025 | 2025 MN NSAC 10 U LC State Championship | |
| 343 | Enzo Harter | 53.19 | 10 | BB Min | A: 47.89 (+5.30s | 10.0%) | Beaverton Area Aquatics Club | 04/18/2025 | 2025 MAC LONG COURSE INVITATIONAL | |
| 344 | Joseph James | 53.19 | 10 | BB Min | A: 47.89 (+5.30s | 10.0%) | Southwest Stars Swim Club | 06/12/2025 | 2025 RAFC Summer Solstice | |
| 345 | Marco Gonzalez | 53.20 | 10 | BB Min | A: 47.89 (+5.31s | 10.0%) | South Bay Aquatics | 06/20/2025 | 2025 SI SPLASH AND DASH | |
| 346 | Henry Zheng | 53.24 | 9 | BB Min | A: 47.89 (+5.35s | 10.0%) | Aquajets Swim Team | 07/23/2025 | 2025 MN NSAC 10 U LC State Championship | |
| 347 | Braylon Ward | 53.26 | 10 | BB Min | A: 47.89 (+5.37s | 10.1%) | Texas Gold | 05/02/2025 | 2025 ST 22nd Annual Cinco De Mayo | |
| 348 | Jackson Macaluso | 53.34 | 10 | BB Min | A: 47.89 (+5.45s | 10.2%) | Tampa Elite Aquatics | 04/11/2025 | 2025 Stingrays Early LCM Season Opener | |
| 349 | Samik Dangol | 53.39 | 9 | BB Min | A: 47.89 (+5.50s | 10.3%) | Stingrays Swim Team | 07/11/2024 | 2024 RAYS Summer Awards | |
| 350 | Tatsumasa Sekine | 53.42 | 9 | BB Min | A: 47.89 (+5.53s | 10.4%) | Santa Clara Swim Club | 06/27/2025 | Valley Splash | |
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.