USA Boys 10 & under - 50 Y Free
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 | Eason Kim | 32.67 | 9 | BB Min | A: 31.09 (+1.58s | 4.8%) | All Star Aquatics | 12/11/2025 | 2025 Riley Eaton Holiday Invitational | |
| 1952 | Daniel Popko | 32.67 | 9 | BB Min | A: 31.09 (+1.58s | 4.8%) | Matchpoint Nyc | 01/16/2026 | 2026 MR LIE Winterfest Invitational | |
| 1953 | Sava Sikirica | 32.68 | 10 | BB Min | A: 31.09 (+1.59s | 4.9%) | Suburban Seahawks Club | 12/11/2025 | 2025 Katie Ledecky Invitational | |
| 1954 | Charles Perry | 32.68 | 10 | BB Min | A: 31.09 (+1.59s | 4.9%) | North Carolina Aquatic Club | 03/26/2026 | 2026 NCAC Spring Tar Heel States Copied | |
| 1955 | Forest Hastings | 32.68 | 10 | BB Min | A: 31.09 (+1.59s | 4.9%) | Roseburg High School | 02/14/2025 | 2025 OR HS 6A 7 | |
| 1956 | Grant Zimmermann | 32.68 | 10 | BB Min | A: 31.09 (+1.59s | 4.9%) | YMCA of the Triangle Area Swim | 01/23/2026 | GCY Winter Meet 2026 | |
| 1957 | Michael Evans | 32.68 | 10 | BB Min | A: 31.09 (+1.59s | 4.9%) | Sea Dragon Aquatics | 11/22/2025 | 2025 SDA November Open | |
| 1958 | Asher Caponera | 32.68 | 9 | BB Min | A: 31.09 (+1.59s | 4.9%) | Florida Atlantic Aquatics | 02/20/2026 | 2026 FG SCY BB Championships (NORTH) | |
| 1959 | Caleb Shepler | 32.69 | 9 | BB Min | A: 31.09 (+1.60s | 4.9%) | Motor City Aquatics | 03/07/2026 | 2026 Lake Erie Regional Meet | |
| 1960 | George Yu | 32.69 | 10 | BB Min | A: 31.09 (+1.60s | 4.9%) | Santa Clara Swim Club | 12/05/2025 | Zone 1S Year End Age Group Champs Minus Meet | |
| 1961 | Brian Yu | 32.69 | 10 | BB Min | A: 31.09 (+1.60s | 4.9%) | Dare Aquatics | 12/12/2025 | 2025 CA SCS RAA WAG | |
| 1962 | Jake McNair | 32.69 | 9 | BB Min | A: 31.09 (+1.60s | 4.9%) | Bellevue Club Swim Team | 03/19/2026 | 2026 Northwest Region AG Champs Approved | |
| 1963 | Keller Cox | 32.70 | 10 | BB Min | A: 31.09 (+1.61s | 4.9%) | All Star Aquatics | 02/13/2026 | 2026 ASA President S Day Classic | |
| 1964 | Luca DeTillio | 32.70 | 10 | BB Min | A: 31.09 (+1.61s | 4.9%) | Bolles School Sharks | 02/20/2026 | 2026 Area 1 Spring Championships | |
| 1965 | Yong-Jun Yu | 32.70 | 10 | BB Min | A: 31.09 (+1.61s | 4.9%) | Sierra Marlins Swim Team | 02/13/2026 | 2026 Neptune Swimming Invitational | |
| 1966 | Aaron Kim | 32.70 | 10 | BB Min | A: 31.09 (+1.61s | 4.9%) | EL Paso Border Land Swim Team | 12/19/2025 | 2025 BD Leo Cancellare Memorial Swim Meet | |
| 1967 | Liam O'Brien | 32.70 | 9 | BB Min | A: 31.09 (+1.61s | 4.9%) | Walnut Creek Aquabears | 11/01/2025 | Kati McDermott Memorial Fall Jamboree Invite | |
| 1968 | Kai Jo | 32.70 | 10 | BB Min | A: 31.09 (+1.61s | 4.9%) | Punahou Aquatics Institute | 10/25/2025 | 2025 HI 25th Annual Bill Smith Invitational | |
| 1969 | Finn Kelly | 32.70 | 10 | BB Min | A: 31.09 (+1.61s | 4.9%) | Annapolis Swim Club | 03/13/2026 | 2026 Speedo Maryland Junior Championship Si | |
| 1970 | Micah Balmaceda | 32.70 | 10 | BB Min | A: 31.09 (+1.61s | 4.9%) | Commonwealth Swimming | 12/11/2025 | 2025 NE SHAWMUT Candy Cane Classic | |
| 1971 | Demid Mozgov | 32.71 | 10 | BB Min | A: 31.09 (+1.62s | 5.0%) | Bure-Aqua Academy | 02/14/2026 | 2026 CO ACES Winter Open | |
| 1972 | Lucas Ni | 32.71 | 9 | BB Min | A: 31.09 (+1.62s | 5.0%) | Makos Aquatics Club of Gainesv | 02/28/2026 | 2026 Area 4 Spring Champs | |
| 1973 | Nikoloz Zhorzholiani | 32.71 | 9 | BB Min | A: 31.09 (+1.62s | 5.0%) | Seattle Metropolitan Aquatic C | 02/27/2026 | 2026 PN February AGI, Div 1 Approved | |
| 1974 | Everett Beichner | 32.71 | 9 | BB Min | A: 31.09 (+1.62s | 5.0%) | Machine Aquatics | 12/04/2025 | 2025 PV Turkey Claus Showdown | |
| 1975 | Aaron Rich | 32.71 | 10 | BB Min | A: 31.09 (+1.62s | 5.0%) | Kingfish Swimming Medfield | 02/13/2026 | 2026 NE SAC 10 Under Champs | |
| 1976 | Preston Tran | 32.71 | 10 | BB Min | A: 31.09 (+1.62s | 5.0%) | Irvine Novaquatics | 02/14/2025 | 2025 CCS SCY AGC | |
| 1977 | Jonathan Li | 32.72 | 8 | BB Min | A: 31.09 (+1.63s | 5.0%) | Brea Aquatics | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 1978 | Palmantonio Semerano | 32.72 | 10 | B Min | BB: 30.49 (+2.23s | 6.8%) | Belen Jesuit Preparatory | 10/17/2025 | 2025 Belen Jesuit Invitational | |
| 1979 | Nick Scarpitti | 32.72 | 10 | BB Min | A: 31.09 (+1.63s | 5.0%) | Cincinnati Aquatic Club | 03/12/2026 | 2026 OH SC Junior Championships | |
| 1980 | Evan Wik | 32.72 | 8 | BB Min | A: 31.09 (+1.63s | 5.0%) | Southwest Stars Swim Club | 02/21/2026 | 2026 SLAC Last Chance To Dance Invitational | |
| 1981 | Matthew Castaneda | 32.72 | 10 | BB Min | A: 31.09 (+1.63s | 5.0%) | Seattle Metropolitan Aquatic C | 03/19/2026 | 2026 NW Region Age Group Champs Approved | |
| 1982 | William Heath | 32.73 | 10 | BB Min | A: 31.09 (+1.64s | 5.0%) | YMCA of Greater Nashua Storm | 10/10/2025 | 2025 NE CRA October Distance Specialty Meet | |
| 1983 | Corban Williams | 32.73 | 9 | BB Min | A: 31.09 (+1.64s | 5.0%) | Selah | 01/10/2026 | 2026 Kentridge High School Invitational Obse | |
| 1984 | Kenneth Huang | 32.73 | 10 | BB Min | A: 31.09 (+1.64s | 5.0%) | Charles River Aquatics | 12/11/2025 | 2025 NE CRA Winter Invitational | |
| 1985 | Liam Markey | 32.73 | 10 | BB Min | A: 31.09 (+1.64s | 5.0%) | Apex Aquatic Club | 02/20/2026 | 2026 FXFX Forty Niner | |
| 1986 | Andrick McDermott | 32.73 | 10 | BB Min | A: 31.09 (+1.64s | 5.0%) | Nation\\\\\\'s Capital Swim Club | 01/10/2026 | 2026 MAKO POLAR PLUNGE | |
| 1987 | Elliott Renner | 32.73 | 10 | BB Min | A: 31.09 (+1.64s | 5.0%) | Upper Arlington Swim Club | 03/12/2026 | 2026 OH SC Junior Championships | |
| 1988 | Liam Woods | 32.74 | 10 | BB Min | A: 31.09 (+1.65s | 5.0%) | Nova of Virginia | 03/21/2026 | NOVA Short Course Send Off 2026 | |
| 1989 | Conrad Shwe | 32.74 | 9 | BB Min | A: 31.09 (+1.65s | 5.0%) | Clovis Swim Club | 01/10/2026 | 2026 Clovis Swim Club Winter Open | |
| 1990 | Luka O'Brien | 32.74 | 10 | BB Min | A: 31.09 (+1.65s | 5.0%) | The Woodlands Swim Team | 10/25/2024 | 2024 TWST Halloween Meet | |
| 1991 | Lucas Panez | 32.74 | 10 | BB Min | A: 31.09 (+1.65s | 5.0%) | Heritage Aquatic Team | 02/20/2026 | 2026 FG SCY BB Championships (NORTH) | |
| 1992 | Everett McDonald | 32.74 | 10 | BB Min | A: 31.09 (+1.65s | 5.0%) | Long Island Aquatic Club | 12/05/2025 | 2025 MR NYS Holiday Classic Trials Finals | |
| 1993 | Noah Finkel | 32.75 | 10 | BB Min | A: 31.09 (+1.66s | 5.1%) | Nation\\\\\\'s Capital Swim Club | 01/17/2026 | PVS January Open 2026 Fairland | |
| 1994 | Logan Dannemiller | 32.76 | 10 | BB Min | A: 31.09 (+1.67s | 5.1%) | Hurricane Aquatics | 02/20/2026 | 2026 FG SCY BB Championships SOUTH | |
| 1995 | Braden Dunlap | 32.76 | 9 | BB Min | A: 31.09 (+1.67s | 5.1%) | Naval Academy Aquatic Club | 03/05/2026 | 2026 MD LSC 14 U Championships | |
| 1996 | Nolan Porras | 32.76 | 9 | BB Min | A: 31.09 (+1.67s | 5.1%) | Long Island Express | 01/30/2026 | 2026 MR LIE Second Chance Invitational | |
| 1997 | Robert Bates | 32.76 | 9 | BB Min | A: 31.09 (+1.67s | 5.1%) | Trident Aquatic Club | 03/13/2026 | 2026 MR SC Junior Metropolitan Championships | |
| 1998 | Minjun Park | 32.76 | 10 | BB Min | A: 31.09 (+1.67s | 5.1%) | Chinook Aquatic Club | 02/27/2026 | 2026 PN February AGI, Division 2 Approved | |
| 1999 | Johnathan Wang | 32.76 | 9 | BB Min | A: 31.09 (+1.67s | 5.1%) | Alto Swim Club | 03/28/2026 | Alto Rock The Blocks Invitational 2026 | |
| 2000 | Adam Milgrom | 32.76 | 10 | BB Min | A: 31.09 (+1.67s | 5.1%) | Hurricanes Swim Team | 03/07/2026 | 2026 MN RSC 10 U State Championship | |
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.