USA Boys 10 & under - 50 Y 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 | |
|---|---|---|---|---|---|---|---|---|---|
| 601 | Ari Mobasseri | 42.57 | 8 | BB Min | A: 42.09 (+0.48s | 1.1%) | Aquazot Swim Club | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 602 | Enrique Acosta | 42.57 | 10 | BB Min | A: 42.09 (+0.48s | 1.1%) | EL Paso Border Land Swim Team | 02/27/2026 | 2026 BD SCY Border Champs | |
| 603 | James Milchteim | 42.58 | 9 | BB Min | A: 42.09 (+0.49s | 1.2%) | Bay Club Aquatics | 03/06/2026 | 2026 SI 14U AGE GRP CHAMPIONSHIPS | |
| 604 | Bill Curran | 42.58 | 9 | BB Min | A: 42.09 (+0.49s | 1.2%) | Revolution Swim Club | 02/13/2026 | 2026 NE SAC 10 Under Champs | |
| 605 | Carter Novak | 42.58 | 10 | BB Min | A: 42.09 (+0.49s | 1.2%) | Aquatic Team Of Mecklenburg | 03/20/2026 | 2026 BRSL Championships | |
| 606 | Santiago Diaz | 42.59 | 9 | BB Min | A: 42.09 (+0.50s | 1.2%) | Rockville Montgomery Swim Club | 01/16/2026 | 2026 RMSC January Intrasquad Meet | |
| 607 | Carson Yin | 42.60 | 10 | BB Min | A: 42.09 (+0.51s | 1.2%) | Tualatin Hills Swim Club | 05/16/2026 | 2026 John DeRoest Sextathlon Swim Meet | |
| 608 | William Martzke | 42.61 | 10 | BB Min | A: 42.09 (+0.52s | 1.2%) | Birmingham \\\\\\'y\\\\\\' Blue Dolphins | 10/17/2025 | 2025 OLY Fall Classic | |
| 609 | Adam Ma | 42.61 | 10 | BB Min | A: 42.09 (+0.52s | 1.2%) | California Dolphins Swim Team | 05/17/2026 | Montclair 14 Under Short Course Pentathlon | |
| 610 | Elliott Boland | 42.61 | 10 | BB Min | A: 42.09 (+0.52s | 1.2%) | Academy Swim Club | 02/26/2026 | 2026 HI Hawaiian Swimming SCY AGChamps | |
| 611 | Santiago Diaz | 42.61 | 9 | BB Min | A: 42.09 (+0.52s | 1.2%) | Rockville Montgomery Swim Club | 12/11/2025 | 2025 Riley Eaton Holiday Invitational | |
| 612 | Phinnaeus Johnson | 42.62 | 10 | BB Min | A: 42.09 (+0.53s | 1.2%) | Gilroy Gators Swim Team | 01/16/2026 | 2026 Brian Malick Memorial Z1S Championships | |
| 613 | Max Matov | 42.62 | 10 | BB Min | A: 42.09 (+0.53s | 1.2%) | Commonwealth Swimming | 02/13/2026 | 2026 NE SAC 10 Under Champs | |
| 614 | Pietro Bucci | 42.63 | 10 | BB Min | A: 42.09 (+0.54s | 1.3%) | United Swim Club | 02/13/2026 | 2026 NE SAC 10 Under Champs | |
| 615 | James Heilbronn | 42.64 | 10 | BB Min | A: 42.09 (+0.55s | 1.3%) | Saline Swim Team | 03/14/2026 | 2026 SCY 10 Under Championship Meet | |
| 616 | Adrian Andrychowski | 42.64 | 10 | BB Min | A: 42.09 (+0.55s | 1.3%) | Westport Weston Family YMCA Wa | 12/11/2025 | 2025 NE SHAWMUT Candy Cane Classic | |
| 617 | Everett King | 42.65 | 10 | BB Min | A: 42.09 (+0.56s | 1.3%) | Worthington Swim Club | 03/12/2026 | 2026 OH SC Junior Championships | |
| 618 | Jameson Knesek | 42.65 | 10 | BB Min | A: 42.09 (+0.56s | 1.3%) | Supernova Swim Team | 03/14/2026 | 2026 SCY 10 Under Championship Meet | |
| 619 | Thomas Ciarniello | 42.65 | 10 | BB Min | A: 42.09 (+0.56s | 1.3%) | Nation\\\\\\'s Capital Swim Club | 01/17/2026 | PVS January Open 2026 PWCS | |
| 620 | Kaimana Hashimoto | 42.66 | 10 | BB Min | A: 42.09 (+0.57s | 1.3%) | Splash Aquatics | 04/18/2026 | 44th Annual Harry Mamizuka Invitational | |
| 621 | Alex Dmyterko | 42.66 | 10 | BB Min | A: 42.09 (+0.57s | 1.3%) | Wahoo\\\\\\'s of Wellington | 03/05/2026 | 2026 FG Age Group SCY Championships | |
| 622 | Emmett Tourney | 42.68 | 10 | BB Min | A: 42.09 (+0.59s | 1.4%) | Red Wing Swim Club | 03/07/2026 | 2026 MN RSC 10 U State Championship | |
| 623 | Tatsumasa Sekine | 42.68 | 9 | BB Min | A: 42.09 (+0.59s | 1.4%) | Santa Clara Swim Club | 03/28/2026 | Swim South Bay | |
| 624 | Davis Chappell | 42.68 | 10 | BB Min | A: 42.09 (+0.59s | 1.4%) | Hampton Virginia Current | 11/14/2025 | ISCA Fall Classic Championship 2025 | |
| 625 | Theodore Lahre | 42.69 | 9 | BB Min | A: 42.09 (+0.60s | 1.4%) | Bgc-N. Westchester Marlins | 03/13/2026 | 2026 MR SC Junior Metropolitan Championships | |
| 626 | Matthew Frankovic | 42.70 | 9 | BB Min | A: 42.09 (+0.61s | 1.4%) | Twisters Swim Club | 01/24/2026 | 2026 MR FLY Fran Schnarr Sprint Pentathlon Me | |
| 627 | Jake Brown | 42.70 | 10 | BB Min | A: 42.09 (+0.61s | 1.4%) | Birmingham \\\\\\'y\\\\\\' Blue Dolphins | 02/13/2026 | 2026 Showdown In Motown | |
| 628 | Reagan Wilsey | 42.70 | 10 | BB Min | A: 42.09 (+0.61s | 1.4%) | Palo Alto Stanford Aquatics | 01/24/2026 | 2026 Zone 1 North Championships | |
| 629 | Reyansh Dhwajad | 42.70 | 10 | BB Min | A: 42.09 (+0.61s | 1.4%) | SwimMAC Carolina | 03/20/2026 | 2026 SwimMAC Tar Heel States | |
| 630 | Yaroslav Biliavskyi | 42.71 | 10 | BB Min | A: 42.09 (+0.62s | 1.5%) | Tac Titans | 03/25/2026 | 2026 TAC TITANS Tarheel States Meet | |
| 631 | Anderson Smith | 42.71 | 10 | BB Min | A: 42.09 (+0.62s | 1.5%) | Huntington YMCA Bluefish | 02/20/2026 | 2026 MR Silvers Championship South HAUP | |
| 632 | Orion Blue-Smith | 42.71 | 10 | BB Min | A: 42.09 (+0.62s | 1.5%) | Palo Alto Stanford Aquatics | 12/20/2025 | 2025 PASA Winter Frolic Meet @ PALY HS | |
| 633 | Thomas Klinger | 42.71 | 10 | BB Min | A: 42.09 (+0.62s | 1.5%) | Tide Swimming | 03/21/2026 | NOVA Short Course Send Off 2026 | |
| 634 | Oliver Shalvey | 42.72 | 10 | BB Min | A: 42.09 (+0.63s | 1.5%) | Excel Aquatics | 01/16/2026 | 2026 TYR Mardi Gras Invite | |
| 635 | Bruce Asmega | 42.73 | 10 | BB Min | A: 42.09 (+0.64s | 1.5%) | Pacifica Sea Lions | 03/07/2026 | BAC Race To AGCs | |
| 636 | Gustavo Granados | 42.74 | 9 | BB Min | A: 42.09 (+0.65s | 1.5%) | Fenix Swim Club | 02/20/2026 | 2026 FG SCY BB Championships SOUTH | |
| 637 | Jackson Staples | 42.75 | 10 | BB Min | A: 42.09 (+0.66s | 1.5%) | Las Cruces Aquatic Team | 02/13/2026 | 2026 BD Arctic BLAST Swim Meet | |
| 638 | Henry Goddard | 42.75 | 10 | BB Min | A: 42.09 (+0.66s | 1.5%) | Cascadia Swimming | 08/01/2025 | Big Kahuna 2025 | |
| 639 | Ethan Gaffin | 42.77 | 9 | BB Min | A: 42.09 (+0.68s | 1.6%) | Alamo Area Aquatic Association | 02/13/2026 | 2026 ST HPAC STX Champs South | |
| 640 | Charles Swinsick | 42.78 | 10 | BB Min | A: 42.09 (+0.69s | 1.6%) | Marlins Of Raleigh | 02/13/2026 | Speedo 2026 MOR Short Course Qualifier Meet | |
| 641 | Camille Turpin | 42.79 | 10 | BB Min | A: 42.09 (+0.70s | 1.6%) | Asphalt Green Unified Aquatics | 01/30/2026 | 2026 MR LIE Second Chance Invitational | |
| 642 | Cooper Chen | 42.79 | 10 | BB Min | A: 42.09 (+0.70s | 1.6%) | Asphalt Green Unified Aquatics | 01/30/2026 | 2026 MR LIE Second Chance Invitational | |
| 643 | Emilio Balcazar | 42.80 | 10 | BB Min | A: 42.09 (+0.71s | 1.7%) | Centro Acuatico Universitario | 12/19/2025 | 2025 BD Leo Cancellare Memorial Swim Meet | |
| 644 | William Martzke | 42.80 | 10 | BB Min | A: 42.09 (+0.71s | 1.7%) | Birmingham \\\\\\'y\\\\\\' Blue Dolphins | 01/16/2026 | 2026 Odd Age Classic | |
| 645 | Cameron Ehrlich | 42.80 | 10 | BB Min | A: 42.09 (+0.71s | 1.7%) | Pompano Beach Piranhas | 12/06/2025 | 2025 Pompano Beach Santa Claus Meet | |
| 646 | Peter Hofman | 42.81 | 10 | BB Min | A: 42.09 (+0.72s | 1.7%) | Cascade Swim Club | 03/07/2026 | 2026 PDST Mar Pentathlon Last Chance Approved | |
| 647 | Noah Olusanya | 42.81 | 9 | BB Min | A: 42.09 (+0.72s | 1.7%) | 03/05/2026 | 2026 Florida Swimming FLAGS NORTH | ||
| 648 | Yaseer Owens | 42.83 | 9 | BB Min | A: 42.09 (+0.74s | 1.7%) | Unified Aquatics Club | 03/12/2026 | 2026 OH SC Junior Championships | |
| 649 | Zuriel Cariazo | 42.83 | 10 | BB Min | A: 42.09 (+0.74s | 1.7%) | Montrose Marlins Swim Club | 05/16/2026 | 2026 CO Sopris FAST Challenge | |
| 650 | Matheus Jacqmin Abijaodi | 42.83 | 10 | BB Min | A: 42.09 (+0.74s | 1.7%) | Marlins Of Raleigh | 03/25/2026 | 2026 TAC TITANS Tarheel States 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.