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 | |
|---|---|---|---|---|---|---|---|---|---|
| 2501 | Marcus Kalmi | 48.09 | 9 | B Min | BB: 47.69 (+0.40s | 0.8%) | Riptide Swim Team | 01/09/2026 | 2026 MN FOXJ Winter Classic | |
| 2502 | Tyne Dunkerley | 48.10 | 10 | B Min | BB: 47.69 (+0.41s | 0.9%) | Patriot Aquatics | 09/13/2025 | 2025 PA Fall Invite | |
| 2503 | Benjamin van Leenen | 48.10 | 10 | B Min | BB: 47.69 (+0.41s | 0.9%) | Brooklyn Stingrays | 10/11/2025 | 2025 MR AGUA Season Starter Invitational | |
| 2504 | Simon Wang | 48.10 | 10 | B Min | BB: 47.69 (+0.41s | 0.9%) | SwimMAC Carolina | 02/14/2026 | 2026 SwimMAC Qualifier Festival | |
| 2505 | John Lehane | 48.10 | 10 | B Min | BB: 47.69 (+0.41s | 0.9%) | Lexington Dolphins | 12/05/2025 | 2025 Beaman Toyota Meet Of Champs | |
| 2506 | Jacob Gamio | 48.10 | 9 | B Min | BB: 47.69 (+0.41s | 0.9%) | Unattached | 01/10/2026 | 2026 ST AHAC B Champs South Copied | |
| 2507 | Aidan Woods | 48.10 | 10 | B Min | BB: 47.69 (+0.41s | 0.9%) | Fort Collins Area Swim Team | 07/09/2025 | 2025 CO NCS 10 U Summer Festival | |
| 2508 | Daniel Popko | 48.10 | 9 | B Min | BB: 47.69 (+0.41s | 0.9%) | Matchpoint Nyc | 12/21/2025 | 2025 MR FREE Freedom Fest Invitational | |
| 2509 | Joshua Metzger | 48.10 | 10 | B Min | BB: 47.69 (+0.41s | 0.9%) | Spy Swim Team | 02/06/2026 | 2026 Last Chance Qualifying Meet | |
| 2510 | Alexander Van Volkenburg | 48.11 | 9 | B Min | BB: 47.69 (+0.42s | 0.9%) | Dads Club Swim Team | 02/21/2025 | 2025 Gulf 12 Under Champs (DADS) | |
| 2511 | Tucker Jensen | 48.11 | 10 | B Min | BB: 47.69 (+0.42s | 0.9%) | Potomac Marlins | 02/07/2026 | 2026 PM 14 U Champs Qualifier | |
| 2512 | Logan Young | 48.11 | 9 | B Min | BB: 47.69 (+0.42s | 0.9%) | Wasatch Front Fish Market | 02/21/2025 | Skyline Last Chance 2025 | |
| 2513 | Myles Mosley | 48.11 | 10 | B Min | BB: 47.69 (+0.42s | 0.9%) | Memphis Thunder Aquatic Club | 01/16/2026 | 2026 Gabrielle Rose Tiger Classic | |
| 2514 | Toby Wong | 48.12 | 10 | B Min | BB: 47.69 (+0.43s | 0.9%) | Quicksilver Swimming | 04/26/2025 | Pacific Swimming 10 Under SC Championships | |
| 2515 | Amir Toleubek | 48.12 | 10 | B Min | BB: 47.69 (+0.43s | 0.9%) | Gulliver Swim Club | 12/06/2025 | 2025 Pompano Beach Santa Claus Meet | |
| 2516 | Liam Feliciano-Sanik | 48.12 | 7 | B Min | BB: 47.69 (+0.43s | 0.9%) | Saint Petersburg Aquatics | 12/12/2025 | 2025 HARRY MEISEL WEST | |
| 2517 | Stuart Franks | 48.12 | 9 | B Min | BB: 47.69 (+0.43s | 0.9%) | Marlins Of Raleigh | 10/24/2025 | 2025 MOR Kick Off | |
| 2518 | Julius Weinstein | 48.12 | 9 | B Min | BB: 47.69 (+0.43s | 0.9%) | Rancho Family YMCA | 10/11/2025 | 2025 SI RSD All Ages B C Meet | |
| 2519 | Edward Uvejzovic | 48.12 | 9 | B Min | BB: 47.69 (+0.43s | 0.9%) | Olympus Aquatics | 12/13/2025 | 2025 UTAH Winter Classic | |
| 2520 | Alexander Sheliagin | 48.12 | 8 | B Min | BB: 47.69 (+0.43s | 0.9%) | SwimRight Team | 01/31/2026 | 2026 Panther Invitational | |
| 2521 | Noah Finkel | 48.12 | 10 | B Min | BB: 47.69 (+0.43s | 0.9%) | Nation\\\\\\'s Capital Swim Club | 10/25/2025 | 2025 PAC 10 Under RockHopper Penguin Meet | |
| 2522 | Ethan Vasilescu | 48.12 | 10 | B Min | BB: 47.69 (+0.43s | 0.9%) | All Star Aquatics | 11/14/2025 | ISCA Fall Classic Championship 2025 | |
| 2523 | Alexander Pevzner | 48.13 | 10 | B Min | BB: 47.69 (+0.44s | 0.9%) | Ridgewood YMCA Breakers Swim T | 10/10/2025 | 2025 MR COND October Fall Festival | |
| 2524 | Harrison Adair | 48.13 | 10 | B Min | BB: 47.69 (+0.44s | 0.9%) | All Star Aquatics | 12/05/2025 | 2025 Christmas Championships | |
| 2525 | Jacob Lee | 48.13 | 7 | B Min | BB: 47.69 (+0.44s | 0.9%) | Twisters Swim Club | 01/17/2026 | 2026 MR AGUA MLK Invitational | |
| 2526 | Barrett Steyert | 48.13 | 10 | B Min | BB: 47.69 (+0.44s | 0.9%) | YMCA East Hampton Hurricanes | 01/30/2026 | 2026 MR SSC Polar Bear Plunge | |
| 2527 | James Strate | 48.13 | 9 | B Min | BB: 47.69 (+0.44s | 0.9%) | Tac Titans | 02/14/2026 | 2026 TAC TITANS February Qualifier Meet | |
| 2528 | Oliver Penfield | 48.14 | 9 | B Min | BB: 47.69 (+0.45s | 0.9%) | Hydra Aquatics | 01/17/2026 | 2026 PV January Open Audrey Moore | |
| 2529 | William Heath | 48.14 | 9 | B Min | BB: 47.69 (+0.45s | 0.9%) | YMCA of Greater Nashua Storm | 10/10/2025 | 2025 NE CRA October Distance Specialty Meet | |
| 2530 | Mauro Carrasco | 48.14 | 9 | B Min | BB: 47.69 (+0.45s | 0.9%) | Southwest Aquatic Team | 01/23/2026 | 2026 BD JCAT IMX 2026 | |
| 2531 | Evan Fernando | 48.15 | 10 | B Min | BB: 47.69 (+0.46s | 1.0%) | Atlantis Swimming | 10/17/2025 | 2025 OLY Fall Classic | |
| 2532 | Samuel Ollestad | 48.15 | 8 | B Min | BB: 47.69 (+0.46s | 1.0%) | Lone Star Aquatic Club | 12/05/2025 | 2025 ST LSAC 5th Annual Graceland | |
| 2533 | Andrew Miller | 48.15 | 10 | B Min | BB: 47.69 (+0.46s | 1.0%) | Grosse Pointe Gators | 12/06/2025 | 2025 26 Super Fast And Furious Prelim Final | |
| 2534 | Preston Cain | 48.15 | 10 | B Min | BB: 47.69 (+0.46s | 1.0%) | Streamline Aquatics | 12/20/2025 | 2025 ST SASA Tis The Season | |
| 2535 | Jun Lin | 48.15 | 7 | B Min | BB: 47.69 (+0.46s | 1.0%) | Seattle Metropolitan Aquatic C | 01/17/2026 | 2026 PN SMAC Winter Invitational Approved | |
| 2536 | Jaylen Chen | 48.16 | 9 | B Min | BB: 47.69 (+0.47s | 1.0%) | Riptide Swim Team | 11/01/2025 | 2025 MN NOR Champ Belt Sprint Spec (Fall) | |
| 2537 | Levi McCloy | 48.16 | 10 | B Min | BB: 47.69 (+0.47s | 1.0%) | High Performance Aquatic Club | 12/06/2025 | 2025 HPAC 5th Annual Festivus Winterfest | |
| 2538 | Christian Hochberg | 48.16 | 10 | B Min | BB: 47.69 (+0.47s | 1.0%) | All Star Aquatics | 10/11/2025 | 2025 ASA October Kick Off | |
| 2539 | Joshua Lee | 48.16 | 9 | B Min | BB: 47.69 (+0.47s | 1.0%) | Quince Orchard Swim Academy | 10/25/2025 | 2025 PAC 10 Under RockHopper Penguin Meet | |
| 2540 | Raymond Zhang | 48.17 | 9 | B Min | BB: 47.69 (+0.48s | 1.0%) | Long Island Aquatic Club | 11/01/2025 | 2025 MR TRI Fall SCY Invitational | |
| 2541 | Kenneth Zhang | 48.17 | 8 | B Min | BB: 47.69 (+0.48s | 1.0%) | Santa Clara Swim Club | 11/14/2025 | 2025 Santa Clara Swim Club SC CBA Meet | |
| 2542 | Stephan Fesenko | 48.18 | 7 | B Min | BB: 47.69 (+0.49s | 1.0%) | Bolles School Sharks | 12/04/2025 | RAFC Winter Classic | |
| 2543 | Richard Merpi | 48.18 | 11 | B Min | BB: 47.69 (+0.49s | 1.0%) | Aces Swim Club | 01/23/2026 | 2026 CO TOPS Colorado Open | |
| 2544 | Joon Cha | 48.18 | 9 | B Min | BB: 47.69 (+0.49s | 1.0%) | Sunnyvale Swim Club | 01/24/2026 | 2026 Zone 1 North Championships | |
| 2545 | Zachary DeLozier | 48.18 | 8 | B Min | BB: 47.69 (+0.49s | 1.0%) | Lake Oswego Swim Club | 08/02/2025 | Mallard Nation Invitational | |
| 2546 | Kai Vo | 48.18 | 9 | B Min | BB: 47.69 (+0.49s | 1.0%) | Splash Aquatics | 12/06/2025 | 45th Annual Ken Suenaga Invitational (SCY) | |
| 2547 | Ethan Piorkowski | 48.18 | 9 | B Min | BB: 47.69 (+0.49s | 1.0%) | Bolles School Sharks | 01/16/2026 | 2026 Pentathlon | |
| 2548 | Christopher Magness | 48.18 | 10 | B Min | BB: 47.69 (+0.49s | 1.0%) | Nation\\\\\\'s Capital Swim Club | 12/04/2025 | 2025 PV Turkey Claus Showdown | |
| 2549 | Matthew Bennett | 48.19 | 10 | B Min | BB: 47.69 (+0.50s | 1.0%) | Pipeline Swimming | 12/12/2025 | 2025 HARRY MEISEL WEST | |
| 2550 | Wesley Brown | 48.19 | 9 | B Min | BB: 47.69 (+0.50s | 1.0%) | Atlantis Swimming | 10/17/2025 | 2025 OLY Fall Classic | |
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.