USA Boys 10 & under - 50 M Back
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 | |
|---|---|---|---|---|---|---|---|---|---|
| 1851 | Dean Kosiorek | 48.47 | 8 | BB Min | A: 43.09 (+5.38s | 11.1%) | Dedham Health Hydra | 06/26/2026 | 2026 NE NSSC June 26 28 MIT Invitational | |
| 1852 | George Bilyk | 48.49 | 9 | BB Min | A: 43.09 (+5.40s | 11.1%) | Issaquah Swim Team | 07/09/2026 | 2026 PN Chinook Seattle Age Group Open Appro | |
| 1853 | Enzo Rodrigues | 48.49 | 9 | BB Min | A: 43.09 (+5.40s | 11.1%) | Longhorn Aquatics | 04/19/2026 | 2026 ST TXLA 10 U Long Course Kick Off | |
| 1854 | Taylor Kent | 48.49 | 9 | BB Min | A: 43.09 (+5.40s | 11.1%) | Birmingham Swim League | 04/18/2026 | 2026 Carson Muir Cowgirl Classic | |
| 1855 | Mason Park | 48.49 | 10 | BB Min | A: 43.09 (+5.40s | 11.1%) | Auburn Aquatics | 05/16/2026 | 2026 Opelika Open | |
| 1856 | Grayson Julien | 48.50 | 10 | BB Min | A: 43.09 (+5.41s | 11.2%) | South Valley Makos | 05/22/2026 | 2026 Zone 1 South Firecracker 400 | |
| 1857 | Brendan Moore | 48.50 | 10 | BB Min | A: 43.09 (+5.41s | 11.2%) | Perry Aquatic Club | 07/24/2025 | 2025 LE Age Group And Senior LC Championships | |
| 1858 | Rhys Mehta | 48.50 | 9 | BB Min | A: 43.09 (+5.41s | 11.2%) | Tualatin Hills Swim Club | 06/12/2026 | 2026 THSC June Open | |
| 1859 | Matvii Medvediev | 48.50 | 9 | BB Min | A: 43.09 (+5.41s | 11.2%) | Tornadoes Swim Team | 07/10/2026 | 2026 OSI Arena Summer LC 12 U Championships | |
| 1860 | Connor Jacob | 48.52 | 8 | BB Min | A: 43.09 (+5.43s | 11.2%) | Raleigh Swimming Association | 06/26/2026 | 2026 MOR Long Course Qualifier | |
| 1861 | Parker Widell | 48.53 | 9 | BB Min | A: 43.09 (+5.44s | 11.2%) | Unattached | 06/05/2026 | 2026 TAMPA BAY SWIM CLASSIC | |
| 1862 | Dylan Jablonski | 48.53 | 7 | BB Min | A: 43.09 (+5.44s | 11.2%) | Swim Fort Lauderdale | 07/10/2026 | 2026 FG LCM BB Champs North | |
| 1863 | Derek Nichols | 48.53 | 9 | BB Min | A: 43.09 (+5.44s | 11.2%) | Alamo Area Aquatic Association | 07/25/2025 | 2025 ST AAAA NE LC End Of Season Splash | |
| 1864 | Oliver Li | 48.54 | 10 | BB Min | A: 43.09 (+5.45s | 11.2%) | Eastside Aquatic Swim Team | 07/10/2026 | 2026 PN OCA Last Chance Invitational Approve | |
| 1865 | Ziyan Rong | 48.54 | 10 | BB Min | A: 43.09 (+5.45s | 11.2%) | Kingfish Swimming Medfield | 06/26/2026 | 2026 NE NSSC June 26 28 MIT Invitational | |
| 1866 | Silas Slevin | 48.55 | 9 | BB Min | A: 43.09 (+5.46s | 11.2%) | Lakeside Swim Team | 07/09/2026 | 46th Annual Seahawk Invitational | |
| 1867 | Hudson Goodrich | 48.55 | 9 | BB Min | A: 43.09 (+5.46s | 11.2%) | Denver Swim Academy | 07/24/2026 | 2026 CO Age Group LCM State Championships | |
| 1868 | Taenam Oh jr | 48.56 | 9 | BB Min | A: 43.09 (+5.47s | 11.3%) | Bolles School Sharks | 07/24/2026 | 2026 Area 1 LCM Championships | |
| 1869 | Nicolas Beaubrun | 48.56 | 10 | BB Min | A: 43.09 (+5.47s | 11.3%) | Boston Barracudas | 07/11/2026 | 2026 NE YNS July Last Chance Meet | |
| 1870 | William Rickert | 48.56 | 8 | BB Min | A: 43.09 (+5.47s | 11.3%) | South Orange County Aquatics | 06/11/2026 | 2026 SCS June AG Invite | |
| 1871 | Boone Day | 48.56 | 8 | BB Min | A: 43.09 (+5.47s | 11.3%) | Bend Swim Club | 05/08/2026 | Bend Swim Club May Invitational 2026 | |
| 1872 | Owen Wallin | 48.57 | 8 | BB Min | A: 43.09 (+5.48s | 11.3%) | Swim Tampa Aquatics | 06/05/2026 | 2026 TAMPA BAY SWIM CLASSIC | |
| 1873 | Christopher Scheetz | 48.58 | 9 | BB Min | A: 43.09 (+5.49s | 11.3%) | COSA Swimming | 06/05/2026 | 2026 COSA Long Couse Open | |
| 1874 | Archer Dary | 48.59 | 9 | BB Min | A: 43.09 (+5.50s | 11.3%) | Carolina Aquatic Team | 06/18/2026 | 2026 Tennessee Aquatics June Invitational | |
| 1875 | Aiden Killion | 48.59 | 10 | BB Min | A: 43.09 (+5.50s | 11.3%) | Marlins Of Raleigh | 04/25/2026 | 2026 NCAC Quad Meet | |
| 1876 | Sean Tangmunkong | 48.60 | 9 | BB Min | A: 43.09 (+5.51s | 11.3%) | Unattached | 06/26/2026 | 2026 NE YNS June Prelims Finals Meet | |
| 1877 | Luke Ready | 48.60 | 10 | BB Min | A: 43.09 (+5.51s | 11.3%) | Kennebec Valley YMCA | 07/10/2026 | 2026 NE NSSC July Trials Finals @ Colby | |
| 1878 | Connor Hilton | 48.60 | 9 | BB Min | A: 43.09 (+5.51s | 11.3%) | SwimRVA | 05/29/2026 | 2026 SwimRVA Success Bell | |
| 1879 | Aaron Chen | 48.60 | 10 | BB Min | A: 43.09 (+5.51s | 11.3%) | Hinsdale Swim Club | 06/26/2026 | 2026 SE Richard Quick Invitational | |
| 1880 | William Song | 48.60 | 8 | BB Min | A: 43.09 (+5.51s | 11.3%) | Seattle Metropolitan Aquatic C | 05/28/2026 | 2026 IE VS Apple Capital | |
| 1881 | Jacob Chen | 48.60 | 9 | BB Min | A: 43.09 (+5.51s | 11.3%) | Alto Swim Club | 07/19/2025 | Alto Last Splash | |
| 1882 | Jonathan Greaker | 48.61 | 9 | BB Min | A: 43.09 (+5.52s | 11.4%) | Bolles School Sharks | 04/10/2026 | 2026 April Classic | |
| 1883 | Daniel Gerasimov | 48.62 | 8 | BB Min | A: 43.09 (+5.53s | 11.4%) | Los Gatos Swim Club | 05/22/2026 | 2026 Zone 1 South Firecracker 400 | |
| 1884 | Philip McDevitt | 48.62 | 10 | BB Min | A: 43.09 (+5.53s | 11.4%) | Chinook Aquatic Club | 06/12/2026 | 2026 THSC June Open | |
| 1885 | Anthony Ma | 48.63 | 10 | BB Min | A: 43.09 (+5.54s | 11.4%) | Cottonwood Heights Aquatics | 06/18/2025 | 2025 UT CHAT INVITATIONAL | |
| 1886 | Ruben Pulido | 48.64 | 7 | BB Min | A: 43.09 (+5.55s | 11.4%) | Blue Marlins Of Hialeah Garden | 07/10/2026 | 2026 FG LCM BB Champs South | |
| 1887 | Samuel Holmes | 48.64 | 9 | BB Min | A: 43.09 (+5.55s | 11.4%) | Lowes YMCA Lightning Swim Team | 06/26/2026 | 2026 USRY LC Championships | |
| 1888 | Breydan Maumausolo-Sale | 48.64 | 8 | BB Min | A: 43.09 (+5.55s | 11.4%) | Kamehameha Swim Club | 07/16/2026 | 2026 HISI LCM Championships | |
| 1889 | Moses Wang | 48.64 | 10 | BB Min | A: 43.09 (+5.55s | 11.4%) | Bainbridge Island Swim Club | 05/15/2026 | 2026 PN IST Sockeye Springtime Madness App | |
| 1890 | Advith Vallakati | 48.64 | 10 | BB Min | A: 43.09 (+5.55s | 11.4%) | Buckeye Swim Club | 07/10/2026 | 2026 OH Central LC Regional Champs | |
| 1891 | Nathanael Richards | 48.65 | 9 | BB Min | A: 43.09 (+5.56s | 11.4%) | Spokane Waves Aquatic Team | 07/24/2026 | 2026 IES LC CHAMPIONSHIPS | |
| 1892 | Dylan Hunter | 48.65 | 9 | BB Min | A: 43.09 (+5.56s | 11.4%) | Great Lakes Tritons | 07/09/2026 | 46th Annual Seahawk Invitational | |
| 1893 | Finn Swarts | 48.67 | 8 | BB Min | A: 43.09 (+5.58s | 11.5%) | North Jeffco Swim Team | 04/12/2026 | 2026 CO NJ SBL Pentathlon 12 U | |
| 1894 | Vance Miller | 48.67 | 10 | BB Min | A: 43.09 (+5.58s | 11.5%) | Poseidon Swimming Inc | 06/25/2026 | LC Central District Champs | |
| 1895 | Felix Franson | 48.68 | 9 | BB Min | A: 43.09 (+5.59s | 11.5%) | Pikes Peak Athletics | 06/19/2026 | 2026 CO Falfins Long Course Open | |
| 1896 | Chase McElheny | 48.68 | 9 | BB Min | A: 43.09 (+5.59s | 11.5%) | Rec-Plex Sharks | 05/29/2026 | 2026 Meet Me In St Louis Invite | |
| 1897 | Calvin Prosinski | 48.70 | 8 | BB Min | A: 43.09 (+5.61s | 11.5%) | Sporting Jax Aquatic Club | 07/24/2026 | 2026 Area 1 LCM Championships | |
| 1898 | Calder Haberer-Yamini | 48.70 | 9 | BB Min | A: 43.09 (+5.61s | 11.5%) | Tampa Y Swimming | 05/15/2026 | 2026 SAINT PETE S 2nd LONG COURSE MEET | |
| 1899 | Hogan Crow | 48.70 | 10 | BB Min | A: 43.09 (+5.61s | 11.5%) | Unattached | 04/17/2026 | 2026 Shark Attack Copied | |
| 1900 | Samuel Knific | 48.70 | 10 | BB Min | A: 43.09 (+5.61s | 11.5%) | Lakeshore Swim Club | 07/10/2026 | 2026 OH NE LC Regional Champs | |
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.