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 | |
|---|---|---|---|---|---|---|---|---|---|
| 351 | AJ Li | 47.71 | 9 | A Min | AA: 45.79 (+1.92s | 4.0%) | Crimson Aquatics | 07/17/2026 | 2026 NE MST ESC LCM 12 Under Championship | |
| 352 | Yanbo Li | 47.71 | 10 | A Min | AA: 45.79 (+1.92s | 4.0%) | Bolles School Sharks | 04/10/2026 | 2026 April Classic | |
| 353 | Leo Groneck | 47.72 | 10 | A Min | AA: 45.79 (+1.93s | 4.0%) | Northern KY Clippers | 07/16/2026 | 2026 Kentucky Swimming LC Championship 2 Co | |
| 354 | Grant Haire | 47.73 | 10 | A Min | AA: 45.79 (+1.94s | 4.1%) | Worthington Swim Club | 07/23/2026 | 2026 OH LC Junior Championships | |
| 355 | Austin Mitchell | 47.75 | 10 | A Min | AA: 45.79 (+1.96s | 4.1%) | Valley Aquatics | 07/23/2026 | 2026 PN 12 U Long Course Championships Appro | |
| 356 | Cash Bailey | 47.76 | 10 | A Min | AA: 45.79 (+1.97s | 4.1%) | Excel Aquatics | 06/04/2026 | 2026 Beaman Toyota Firecracker Invite | |
| 357 | Jack Macaluso | 47.76 | 10 | A Min | AA: 45.79 (+1.97s | 4.1%) | Tampa Elite Aquatics | 07/09/2026 | 2026 FL Summer Age Group Championships | |
| 358 | Hudson Austin | 47.79 | 10 | A Min | AA: 45.79 (+2.00s | 4.2%) | Bolles School Sharks | 07/09/2026 | 2026 FL Summer Age Group Championships | |
| 359 | Felician Perski Smaluch | 47.79 | 10 | A Min | AA: 45.79 (+2.00s | 4.2%) | Jupiter Dragons Swim Team | 07/16/2026 | 2026 FGC Summer LC Age Group Championships | |
| 360 | Angel Cordero | 47.81 | 10 | A Min | AA: 45.79 (+2.02s | 4.2%) | Equipo Natacion Encantada | 05/01/2026 | Jesse Vasallo Swimming Invitational | |
| 361 | Caleb Lee | 47.82 | 10 | A Min | AA: 45.79 (+2.03s | 4.2%) | Nova of Virginia | 06/11/2026 | NOVA 2026 Virginia Commonwealth Games | |
| 362 | David Xiong | 47.82 | 8 | A Min | AA: 45.79 (+2.03s | 4.2%) | Arctic Aquatics | 06/26/2026 | 2026 NE MST ESC June Memorial | |
| 363 | Frankie Chao | 47.83 | 10 | A Min | AA: 45.79 (+2.04s | 4.3%) | North Carolina Aquatic Club | 07/16/2026 | 2026 NCS LC AG Championships | |
| 364 | Elliott Ganancial | 47.83 | 10 | A Min | AA: 45.79 (+2.04s | 4.3%) | Hawaii Swimming Club | 07/03/2026 | 2026 Keo Nakama Swim Meet | |
| 365 | Kort Mignery | 47.86 | 10 | A Min | AA: 45.79 (+2.07s | 4.3%) | Powell Crosley YMCA | 06/17/2026 | Swim Fort Lauderdale Speedo Summer Classic 26 | |
| 366 | Noah Mobasseri | 47.89 | 9 | A Min | AA: 45.79 (+2.10s | 4.4%) | Aquazot Swim Club | 07/16/2026 | 2026 SCS ELITE Age Group LCM Championship | |
| 367 | Haolin Chen | 47.90 | 10 | BB Min | A: 47.89 (+0.01s | 0.0%) | Pacific Dragons Swim Team | 07/23/2026 | 2026 PN LC 12 U Championships Approved | |
| 368 | Alexander Kovnatsky | 47.90 | 10 | BB Min | A: 47.89 (+0.01s | 0.0%) | Los Angeles Swim Club | 07/25/2024 | 2024 CA SCS BREA Summer A G Champs | |
| 369 | Cayden Willamowski | 47.92 | 9 | BB Min | A: 47.89 (+0.03s | 0.1%) | Lima Family YMCA Swim Team | 07/23/2026 | 2026 OH LC Junior Championships | |
| 370 | William Bradley | 47.92 | 9 | BB Min | A: 47.89 (+0.03s | 0.1%) | Nova of Virginia | 07/16/2026 | 2026 Virginia Swimming LC Age Group Champions | |
| 371 | Layton Groneck | 47.92 | 10 | BB Min | A: 47.89 (+0.03s | 0.1%) | Northern KY Clippers | 06/05/2026 | 25th Annual CLPR David Webb Meet | |
| 372 | Matthew Chen | 47.94 | 9 | BB Min | A: 47.89 (+0.05s | 0.1%) | Waverunners | 07/23/2026 | 2026 NJ Swim LC Gold Championships | |
| 373 | Yu Xu | 47.95 | 10 | BB Min | A: 47.89 (+0.06s | 0.1%) | SwimMAC Carolina | 07/24/2026 | 2026 NC SwimMAC LC Summer Sun Sational | |
| 374 | Liam Taylor | 47.95 | 9 | BB Min | A: 47.89 (+0.06s | 0.1%) | Southwest Stars Swim Club | 07/09/2026 | 2026 FL Summer Age Group Championships | |
| 375 | Merrick Harner | 47.95 | 10 | BB Min | A: 47.89 (+0.06s | 0.1%) | Brevard Swim Club | 07/09/2026 | 2026 FL Summer Age Group Championships | |
| 376 | Walker Lewis | 47.96 | 10 | BB Min | A: 47.89 (+0.07s | 0.1%) | Excel Aquatics | 06/04/2026 | 2026 Beaman Toyota Firecracker Invite | |
| 377 | Emmett Tourney | 47.97 | 10 | BB Min | A: 47.89 (+0.08s | 0.2%) | Red Wing Swim Club | 05/30/2026 | 2026 MN RSC Summer Jam | |
| 378 | Cavan Clark | 47.99 | 10 | BB Min | A: 47.89 (+0.10s | 0.2%) | Uncle Sam Swim Team | 06/20/2026 | 2026 NE NSSC Invitational Springfield College | |
| 379 | Thomas Brinton | 48.02 | 9 | BB Min | A: 47.89 (+0.13s | 0.3%) | Csp Tideriders | 07/23/2026 | 2026 Ozark Long Course Champs Copied | |
| 380 | Jun Lin | 48.02 | 8 | BB Min | A: 47.89 (+0.13s | 0.3%) | Seattle Metropolitan Aquatic C | 07/23/2026 | 2026 PN 12 U Long Course Championships Appro | |
| 381 | Jeffrey Crouse | 48.02 | 10 | BB Min | A: 47.89 (+0.13s | 0.3%) | Livermore AquaCowboys | 06/13/2026 | PC CDST LC C B BB+ 26 074 | |
| 382 | Duke Guo | 48.03 | 10 | BB Min | A: 47.89 (+0.14s | 0.3%) | McAllen Swim Club | 06/06/2026 | 2026 HPAC Sunshine Splash | |
| 383 | Owen McDonald | 48.04 | 10 | BB Min | A: 47.89 (+0.15s | 0.3%) | Houston Hydra | 06/05/2026 | 2026 ST SRG Arena Surge Shark Sizzler | |
| 384 | Vince Cho | 48.04 | 9 | BB Min | A: 47.89 (+0.15s | 0.3%) | Maywood Sparks Swim Team | 06/11/2026 | 2026 SCS June AG Invite CANY | |
| 385 | Mateo Salvador | 48.04 | 10 | BB Min | A: 47.89 (+0.15s | 0.3%) | Metro Area Life Time | 06/20/2026 | 2026 Hot Summer Nights | |
| 386 | Samuel Leven | 48.05 | 10 | BB Min | A: 47.89 (+0.16s | 0.3%) | Unattached | 06/10/2026 | Splash Into Summer | |
| 387 | Rayan Khan | 48.05 | 10 | BB Min | A: 47.89 (+0.16s | 0.3%) | South Shore YMCA Strypers | 07/17/2026 | 2026 NE MST ESC LCM 12 Under Championship | |
| 388 | Trajon Schumacher | 48.05 | 10 | BB Min | A: 47.89 (+0.16s | 0.3%) | Unattached | 06/19/2026 | 2026 MultiCultural Zones | |
| 389 | Finley Brandt | 48.06 | 10 | BB Min | A: 47.89 (+0.17s | 0.4%) | Houston Hydra | 06/05/2026 | 2026 ST SRG Arena Surge Shark Sizzler | |
| 390 | Ray Yu | 48.07 | 10 | BB Min | A: 47.89 (+0.18s | 0.4%) | Aquazot Swim Club | 06/11/2026 | ARMADA 2026 SCS June AG Invite | |
| 391 | Hunter Wilson | 48.07 | 10 | BB Min | A: 47.89 (+0.18s | 0.4%) | Kamehameha Swim Club | 07/16/2026 | 2026 HISI LCM Championships | |
| 392 | Demitry Daniel | 48.07 | 10 | BB Min | A: 47.89 (+0.18s | 0.4%) | Canyons Aquatic Club | 06/11/2026 | 2026 SCS June AG Invite CANY | |
| 393 | Henry Chenier | 48.08 | 10 | BB Min | A: 47.89 (+0.19s | 0.4%) | Blues Aquatics Asheville | 05/15/2026 | 2026 NCAC Meet On The Hill | |
| 394 | Matheus Jacqmin Abijaodi | 48.08 | 10 | BB Min | A: 47.89 (+0.19s | 0.4%) | Marlins Of Raleigh | 07/16/2026 | 2026 NCS LC AG Championships | |
| 395 | Matthew Dong | 48.08 | 9 | BB Min | A: 47.89 (+0.19s | 0.4%) | Unattached | 06/19/2026 | 2026 MultiCultural Zones | |
| 396 | Jiyul Park | 48.08 | 8 | BB Min | A: 47.89 (+0.19s | 0.4%) | C.M. Gatton Beaumont YMCA | 07/16/2026 | 2026 Kentucky Swimming LC Championship 2 Co | |
| 397 | Gavin Samad | 48.10 | 9 | BB Min | A: 47.89 (+0.21s | 0.4%) | Unified Aquatics Club | 07/23/2026 | 2026 OH LC Junior Championships | |
| 398 | Nolan Robertson | 48.10 | 10 | BB Min | A: 47.89 (+0.21s | 0.4%) | Lakeside Swim Team | 07/16/2026 | 2026 Kentucky Swimming LC Championship 2 Co | |
| 399 | Sawyer Heath | 48.11 | 10 | BB Min | A: 47.89 (+0.22s | 0.5%) | Greensboro Community YMCA | 06/12/2026 | 2026 GCY Sprint And Distance | |
| 400 | Matvey Fadeev | 48.13 | 10 | BB Min | A: 47.89 (+0.24s | 0.5%) | Issaquah Swim Team | 05/16/2025 | 2025 PN IST Sockeye Springtime Madness | |
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.