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 | |
|---|---|---|---|---|---|---|---|---|---|
| 1951 | Relja Martic | 46.62 | 10 | BB Min | A: 42.09 (+4.53s | 9.7%) | Tollefson Swimming | 02/01/2026 | 2026 Little Blue Penguin Pentathlon | |
| 1952 | Elis Oskvig | 46.62 | 9 | BB Min | A: 42.09 (+4.53s | 9.7%) | All Star Aquatics | 03/20/2026 | March Madness 2026 | |
| 1953 | Henry Li | 46.62 | 10 | BB Min | A: 42.09 (+4.53s | 9.7%) | Eastern Nassau Aquatic Club | 01/30/2026 | 2026 MR LIE Second Chance Invitational | |
| 1954 | Tristan Wolfe-Ramsey | 46.63 | 9 | BB Min | A: 42.09 (+4.54s | 9.7%) | Razor Aquatics | 03/07/2026 | 2026 Lake Erie Regional Meet | |
| 1955 | Marcus Jensen | 46.63 | 10 | BB Min | A: 42.09 (+4.54s | 9.7%) | Voltage Aquatics | 10/25/2025 | Spook Splash 2025 | |
| 1956 | Graham McPheeters | 46.63 | 9 | BB Min | A: 42.09 (+4.54s | 9.7%) | Egra Waves | 03/07/2026 | 2026 Lake Michigan Regional Meet | |
| 1957 | Cooper Van Horn | 46.64 | 10 | BB Min | A: 42.09 (+4.55s | 9.8%) | Colonel Crawford Swim Team | 03/12/2026 | 2026 OH SC Junior Championships | |
| 1958 | Alexander Paraskevov | 46.64 | 9 | BB Min | A: 42.09 (+4.55s | 9.8%) | Westlake Aquatic Facility | 02/13/2026 | 2026 ST HPAC STX Champs South | |
| 1959 | Brayden Rector | 46.64 | 9 | BB Min | A: 42.09 (+4.55s | 9.8%) | Raleigh Swimming Association | 03/26/2026 | 2026 NCAC Spring Tar Heel States Copied | |
| 1960 | Brayden Anyanwu | 46.65 | 9 | BB Min | A: 42.09 (+4.56s | 9.8%) | Sporting Jax Aquatic Club | 10/10/2025 | 2025 October Classic | |
| 1961 | Alexander Tinajero | 46.65 | 9 | BB Min | A: 42.09 (+4.56s | 9.8%) | First Colony Swim Team, Inc. | 02/21/2025 | 2025 Gulf 12 Under Champs (PACK) | |
| 1962 | Santiago Obando Cometa | 46.65 | 9 | BB Min | A: 42.09 (+4.56s | 9.8%) | Columbia Aquatics Association | 01/03/2026 | 2026 ASTS Invitational | |
| 1963 | Lucas Reznik | 46.65 | 10 | BB Min | A: 42.09 (+4.56s | 9.8%) | Asphalt Green Unified Aquatics | 12/05/2025 | 2025 MR NYS Holiday Classic Trials Finals | |
| 1964 | Tyne Dunkerley | 46.66 | 10 | BB Min | A: 42.09 (+4.57s | 9.8%) | Patriot Aquatics | 02/28/2026 | 2026 Spring Area 2 Championships | |
| 1965 | Blake Baisch | 46.66 | 9 | BB Min | A: 42.09 (+4.57s | 9.8%) | Seattle Metropolitan Aquatic C | 02/27/2026 | 2026 PN February AGI, Div 1 Approved | |
| 1966 | Hunter Schultz | 46.66 | 10 | BB Min | A: 42.09 (+4.57s | 9.8%) | Pacific Swim | 12/04/2025 | 2025 Holiday Swim Festival | |
| 1967 | Dylan Hunter | 46.66 | 9 | BB Min | A: 42.09 (+4.57s | 9.8%) | Great Lakes Tritons | 02/06/2026 | 2026 Michigan Open | |
| 1968 | Crosby Kothe | 46.67 | 10 | BB Min | A: 42.09 (+4.58s | 9.8%) | Mecklenburg Swim Association | 01/23/2026 | 2026 TEAM Arena Western Open Copied | |
| 1969 | Daniel Lin | 46.67 | 10 | BB Min | A: 42.09 (+4.58s | 9.8%) | Dads Club Swim Team | 02/21/2025 | 2025 Gulf 12 Under Champs (DADS) | |
| 1970 | Zac Chang | 46.67 | 10 | BB Min | A: 42.09 (+4.58s | 9.8%) | Westchester Aquatic Club | 12/11/2025 | 35th Annual Winter Championships | |
| 1971 | Adam Rosol | 46.67 | 9 | BB Min | A: 42.09 (+4.58s | 9.8%) | Twisters Swim Club | 02/28/2026 | 2026 MR QNS I Know I Can Invitational | |
| 1972 | Owen Yan | 46.67 | 10 | BB Min | A: 42.09 (+4.58s | 9.8%) | Wave Aquatics | 12/06/2025 | 2025 PN Fall Divisionals, Division 3 WAVE | |
| 1973 | John Telischak | 46.68 | 10 | BB Min | A: 42.09 (+4.59s | 9.8%) | Palo Alto Stanford Aquatics | 11/15/2025 | De Anza Cupertino Aquatics CBA+ Meet | |
| 1974 | Kai Vo | 46.68 | 9 | BB Min | A: 42.09 (+4.59s | 9.8%) | Splash Aquatics | 02/26/2026 | 2026 HI Hawaiian Swimming SCY AGChamps | |
| 1975 | Grayson Bachkosky | 46.68 | 9 | BB Min | A: 42.09 (+4.59s | 9.8%) | Bgc-N. Westchester Marlins | 03/07/2026 | 2026 MR AGUA Last Chance Invitational | |
| 1976 | Thomas Shearer | 46.69 | 10 | BB Min | A: 42.09 (+4.60s | 9.9%) | Sailfish | 01/17/2026 | 2026 ST AQTX B Champs North | |
| 1977 | Declan DiFazio | 46.69 | 10 | BB Min | A: 42.09 (+4.60s | 9.9%) | Hydro-sonic Tiburones | 10/25/2025 | 2025 PAC 10 Under RockHopper Penguin Meet | |
| 1978 | Mikhail Lagzdin | 46.70 | 9 | BB Min | A: 42.09 (+4.61s | 9.9%) | Olympic Cascade Aquatics | 01/24/2026 | 2026 PN PDST Winter Invitational Meet Approv | |
| 1979 | Jason Shen | 46.70 | 9 | BB Min | A: 42.09 (+4.61s | 9.9%) | Long Island Aquatic Club | 01/16/2026 | 2026 MR NFS 43rd Annual Dr MLK Jr Invite | |
| 1980 | Keegan Bertoia | 46.71 | 9 | BB Min | A: 42.09 (+4.62s | 9.9%) | Schertz YMCA Swim Team | 11/22/2025 | 2025 ST NTRO November Invite | |
| 1981 | Shaler Berry | 46.71 | 9 | BB Min | A: 42.09 (+4.62s | 9.9%) | Heartland Swim Assoc | 10/04/2025 | 2025 SI CAST Pentathlon 14 U Copied | |
| 1982 | Carter McGroarty | 46.71 | 9 | BB Min | A: 42.09 (+4.62s | 9.9%) | Nova of Virginia | 01/09/2026 | NOVA New Year S Kick Off | |
| 1983 | Maxwell Shaw | 46.71 | 9 | BB Min | A: 42.09 (+4.62s | 9.9%) | Bluefish Swim Club | 02/08/2026 | 2026 NE ABF ME February Frolic | |
| 1984 | Dresden Ramirez | 46.71 | 9 | BB Min | A: 42.09 (+4.62s | 9.9%) | Legacy Aquatics | 02/06/2026 | 2026 NE CRA Last Chance February Invite | |
| 1985 | Mason Verwers | 46.71 | 9 | BB Min | A: 42.09 (+4.62s | 9.9%) | Unattached | 03/06/2026 | 2026 CO 14 U Silver State | |
| 1986 | Jason Johnston | 46.72 | 9 | BB Min | A: 42.09 (+4.63s | 9.9%) | Aberdeen Swim Club | 10/18/2025 | 2025 SD Spooktacular Intrasquad | |
| 1987 | Jonathan Brightwell | 46.72 | 10 | BB Min | A: 42.09 (+4.63s | 9.9%) | Wake Aquatics | 12/13/2025 | 2025 Santa Splash | |
| 1988 | Julius Voigt | 46.72 | 10 | BB Min | A: 42.09 (+4.63s | 9.9%) | Island Aquatics | 02/07/2026 | 2026 MAGSA A B SCY LAST CHANCE MEET | |
| 1989 | Ezra Keep | 46.72 | 10 | BB Min | A: 42.09 (+4.63s | 9.9%) | Buckeye Swim Club | 03/12/2026 | 2026 OH SC Junior Championships | |
| 1990 | Borja Garrido | 46.73 | 10 | BB Min | A: 42.09 (+4.64s | 9.9%) | Ransom Everglades Aquatic Club | 09/13/2025 | NMST September Invite | |
| 1991 | Andrey Kirnos | 46.73 | 9 | BB Min | A: 42.09 (+4.64s | 9.9%) | Tac Titans | 01/16/2026 | 2026 Vector Security Polar Plunge Meet | |
| 1992 | Ayrton Rangan | 46.74 | 10 | BB Min | A: 42.09 (+4.65s | 9.9%) | Southwestern Aquatics Team - S | 01/18/2025 | 2025 LSST January Frosty Meet | |
| 1993 | Kaya Karapinar | 46.74 | 10 | BB Min | A: 42.09 (+4.65s | 9.9%) | York Swim Club of Northern Vir | 03/20/2026 | March Madness 2026 | |
| 1994 | Tyler Fons | 46.75 | 10 | BB Min | A: 42.09 (+4.66s | 10.0%) | North Jeffco Swim Team | 02/13/2026 | 2026 CO NJ Groundhog Invite | |
| 1995 | Dimitri Powell | 46.76 | 10 | BB Min | A: 42.09 (+4.67s | 10.0%) | Columbia Aquatics Association | 01/03/2026 | 2026 ASTS Invitational | |
| 1996 | Kai Chen | 46.76 | 10 | BB Min | A: 42.09 (+4.67s | 10.0%) | Alto Swim Club | 02/07/2026 | Alto Feb 7 8 CBA Valentines Day | |
| 1997 | Reid Finley | 46.76 | 8 | BB Min | A: 42.09 (+4.67s | 10.0%) | Parkway-Rockwood Gateway Swim | 03/07/2026 | 2026 GTWY 8 Under Champs | |
| 1998 | Isaac Marcuson | 46.77 | 10 | BB Min | A: 42.09 (+4.68s | 10.0%) | Aspire Aquatics of Colorado | 03/06/2026 | 2026 CO 14 U Silver State | |
| 1999 | Beau Markway | 46.77 | 10 | BB Min | A: 42.09 (+4.68s | 10.0%) | Memphis Thunder Aquatic Club | 11/21/2025 | 2025 Tiger Turkey Tumble | |
| 2000 | Callan Bunyan | 46.77 | 8 | BB Min | A: 42.09 (+4.68s | 10.0%) | Southwest Stars Swim Club | 02/28/2026 | 2026 Spring Area 2 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.