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 | |
|---|---|---|---|---|---|---|---|---|---|
| 101 | Noah Thomas | 40.24 | 9 | AA Min | AAA: 38.99 (+1.25s | 3.1%) | Longhorn Aquatics | 04/19/2026 | 2026 ST TXLA 10 U Long Course Kick Off | |
| 102 | Simon Feldman | 40.27 | 9 | AA Min | AAA: 38.99 (+1.28s | 3.2%) | Fast Lane Aquatics | 05/15/2026 | 2026 PA Long Course Invite | |
| 103 | Andrei Emelianov | 40.33 | 9 | AA Min | AAA: 38.99 (+1.34s | 3.3%) | Nitro Swimming | 05/09/2026 | 2026 ST NTRO LC School S Out | |
| 104 | Qifan Gong | 40.34 | 9 | AA Min | AAA: 38.99 (+1.35s | 3.3%) | Bellevue Club Swim Team | 05/01/2026 | 2026 PN BC May Flowers Approved | |
| 105 | Greyson Huddleston | 40.36 | 9 | AA Min | AAA: 38.99 (+1.37s | 3.4%) | Patriot Aquatics | 05/15/2026 | 2026 PA Long Course Invite | |
| 106 | Andres Gomez | 40.43 | 10 | AA Min | AAA: 38.99 (+1.44s | 3.6%) | South Florida Aquatic Club | 05/15/2026 | 2026 Gulliver LCM Summer Classic | |
| 107 | William Wang | 40.47 | 10 | AA Min | AAA: 38.99 (+1.48s | 3.7%) | Pacific Dragons Swim Team | 05/15/2026 | 2026 PN IST Sockeye Springtime Madness App | |
| 108 | Gleb Nikishin | 40.48 | 10 | AA Min | AAA: 38.99 (+1.49s | 3.7%) | SwimRight Team | 01/17/2026 | 2026 Azura Winter Open LCM Invite | |
| 109 | Lucas Ni | 40.50 | 9 | AA Min | AAA: 38.99 (+1.51s | 3.7%) | Makos Aquatics Club of Gainesv | 05/15/2026 | 2026 FAST May Invite | |
| 110 | Declan Benton | 40.52 | 10 | AA Min | AAA: 38.99 (+1.53s | 3.8%) | Sawtooth Aquatic Club | 05/16/2025 | 2025 Spring Fling LC Invitational | |
| 111 | Olin Beerens | 40.58 | 10 | AA Min | AAA: 38.99 (+1.59s | 3.9%) | Longhorn Aquatics | 04/19/2026 | 2026 ST TXLA 10 U Long Course Kick Off | |
| 112 | Graham Greenblatt | 40.59 | 10 | AA Min | AAA: 38.99 (+1.60s | 3.9%) | Swim Streamline at Northampton | 07/16/2025 | 2025 Texas Age Group Championships | |
| 113 | Mason Ryu | 40.71 | 10 | AA Min | AAA: 38.99 (+1.72s | 4.2%) | Klg Sports Swim Team | 07/24/2025 | 2025 CA SCS RAA Summer A G Champs | |
| 114 | Leonardo Maia | 40.73 | 10 | AA Min | AAA: 38.99 (+1.74s | 4.3%) | Swim Coral Springs | 04/18/2026 | SCS Under The Sun Invitational | |
| 115 | Jaden Shin | 40.73 | 10 | AA Min | AAA: 38.99 (+1.74s | 4.3%) | Stingray Swim Team | 05/01/2026 | 2026 PN BC May Flowers Approved | |
| 116 | Lucas Pan | 40.76 | 9 | AA Min | AAA: 38.99 (+1.77s | 4.3%) | Santa Clara Swim Club | 07/31/2025 | 2025 Long Course Far Western Championship | |
| 117 | Nicholas Liu | 40.76 | 9 | AA Min | AAA: 38.99 (+1.77s | 4.3%) | Alto Swim Club | 07/31/2025 | 2025 Long Course Far Western Championship | |
| 118 | Castle Cline | 40.77 | 10 | AA Min | AAA: 38.99 (+1.78s | 4.4%) | Seattle Metropolitan Aquatic C | 04/24/2026 | 2026 PN SMAC Spring Showers LC Challenge | |
| 119 | Andy Tran | 40.89 | 10 | AA Min | AAA: 38.99 (+1.90s | 4.6%) | Seattle Metropolitan Aquatic C | 04/24/2026 | 2026 PN SMAC Spring Showers LC Challenge | |
| 120 | Clayton Chester | 40.91 | 10 | AA Min | AAA: 38.99 (+1.92s | 4.7%) | Heartland Swim Assoc | 07/24/2025 | 2025 SI LC AG CHAMPS | |
| 121 | Zhengran Shao | 40.92 | 10 | AA Min | AAA: 38.99 (+1.93s | 4.7%) | Bolles School Sharks | 04/10/2026 | 2026 April Classic | |
| 122 | Kai McGovern | 40.93 | 10 | AA Min | AAA: 38.99 (+1.94s | 4.7%) | Hurricanes Swim Team | 05/15/2026 | 2026 MN HURR LC Spring Opener | |
| 123 | Wesley Ho | 40.94 | 10 | AA Min | AAA: 38.99 (+1.95s | 4.8%) | Aspire Aquatics of Colorado | 04/24/2026 | 2026 CO Arena Catch Me If You Can | |
| 124 | Preston Tran | 40.99 | 10 | AA Min | AAA: 38.99 (+2.00s | 4.9%) | Irvine Novaquatics | 06/12/2025 | 2025 June Age Group Invite | |
| 125 | Benjamin Du | 41.05 | 10 | AA Min | AAA: 38.99 (+2.06s | 5.0%) | Santa Clara Swim Club | 05/23/2025 | Zone 1 South May Firecracker 500 | |
| 126 | Mason Nordin | 41.06 | 10 | AA Min | AAA: 38.99 (+2.07s | 5.0%) | Foxjets Swim Team | 05/02/2026 | 2026 MN RSC Pentathlon | |
| 127 | Daniel Thorpe | 41.07 | 10 | AA Min | AAA: 38.99 (+2.08s | 5.1%) | Aquajets Swim Team | 07/23/2025 | 2025 MN NSAC 10 U LC State Championship | |
| 128 | Tyler Zhang | 41.09 | 10 | AA Min | AAA: 38.99 (+2.10s | 5.1%) | Pacific Dragons Swim Team | 05/15/2026 | 2026 PN IST Sockeye Springtime Madness App | |
| 129 | Jack Armbruster | 41.12 | 10 | A Min | AA: 41.09 (+0.03s | 0.1%) | San Clemente Aquatic Team | 07/24/2025 | 2025 CA SCS RAA Summer A G Champs | |
| 130 | Nicholas Galvin | 41.12 | 10 | A Min | AA: 41.09 (+0.03s | 0.1%) | Sarasota Sharks | 07/10/2025 | 2025 FL Summer Age Group Championships | |
| 131 | Samuel Fuller | 41.13 | 10 | A Min | AA: 41.09 (+0.04s | 0.1%) | Rose Bowl Aquatics | 06/12/2025 | 2025 CA SCS RAA June Age Group Championships | |
| 132 | Troy Cary | 41.14 | 10 | A Min | AA: 41.09 (+0.05s | 0.1%) | Alamo Heights Aquatic Club ? A | 05/15/2026 | 2026 ST NIST Salute To The Troops | |
| 133 | Elliott Lindley | 41.23 | 9 | A Min | AA: 41.09 (+0.14s | 0.3%) | Los Altos Mountain View Aquati | 05/16/2026 | 2026 DACA LC CBA+ | |
| 134 | Asher Mormino | 41.26 | 10 | A Min | AA: 41.09 (+0.17s | 0.4%) | Bend Swim Club | 05/08/2026 | Bend Swim Club May Invitational 2026 | |
| 135 | Shaler Berry | 41.27 | 10 | A Min | AA: 41.09 (+0.18s | 0.4%) | Heartland Swim Assoc | 04/24/2026 | 2026 SI PS ABB Meet Group A | |
| 136 | Nathan Campbell | 41.31 | 9 | A Min | AA: 41.09 (+0.22s | 0.5%) | Southwestern Aquatics Team - S | 07/16/2025 | 2025 Texas Age Group Championships | |
| 137 | Blake Hathorn | 41.34 | 10 | A Min | AA: 41.09 (+0.25s | 0.6%) | Com Aquatics | 05/15/2026 | 2026 ST SRG LCM Bud Dallmann Memorial | |
| 138 | Matthew Winn | 41.34 | 9 | A Min | AA: 41.09 (+0.25s | 0.6%) | Stingray Swim Team | 05/01/2026 | 2026 PN BC May Flowers Approved | |
| 139 | Ari Thorne | 41.38 | 10 | A Min | AA: 41.09 (+0.29s | 0.7%) | Sarasota Sharks | 04/25/2026 | 11th Annual Hohne Memorial Invitational | |
| 140 | Bennett Meusel | 41.39 | 10 | A Min | AA: 41.09 (+0.30s | 0.7%) | South East Metro Sharks | 05/03/2026 | 2026 MN SEMS LC Invite | |
| 141 | Jozua Sugianto | 41.43 | 10 | A Min | AA: 41.09 (+0.34s | 0.8%) | California Dolphins Swim Team | 05/02/2026 | Alto Spring Jam CBA | |
| 142 | Jacob Liu | 41.50 | 10 | A Min | AA: 41.09 (+0.41s | 1.0%) | Trident Swim Club | 07/24/2025 | 2025 CA SCS RAA Summer A G Champs | |
| 143 | Alex Joy | 41.51 | 10 | A Min | AA: 41.09 (+0.42s | 1.0%) | Los Altos Mountain View Aquati | 05/16/2026 | 2026 DACA LC CBA+ | |
| 144 | Aedan Allen | 41.56 | 10 | A Min | AA: 41.09 (+0.47s | 1.1%) | Unattached | 05/01/2026 | 2026 ST HCA Long Course Invitational | |
| 145 | Dongxin Xian | 41.57 | 10 | A Min | AA: 41.09 (+0.48s | 1.2%) | Arcadia Riptides Swim Club | 07/23/2025 | 2025 CA SCS Summer A G Champs | |
| 146 | Kai Hawkes | 41.57 | 10 | A Min | AA: 41.09 (+0.48s | 1.2%) | Multnomah Athletic Club | 05/01/2026 | 2026 THSC Spring Invite | |
| 147 | Gavin Mahrous | 41.59 | 9 | A Min | AA: 41.09 (+0.50s | 1.2%) | Sioux Falls Swim Team | 05/09/2025 | 2025 SD SFST Ready For Long Course | |
| 148 | Angel Garcia III | 41.59 | 10 | A Min | AA: 41.09 (+0.50s | 1.2%) | Golden West Swim Club | 07/25/2024 | 2024 CA SCS GWSC Summer A G Champs | |
| 149 | Robert Botterill | 41.69 | 10 | A Min | AA: 41.09 (+0.60s | 1.4%) | Granite City Aquatics | 07/23/2025 | 2025 MN NSAC 10 U LC State Championship | |
| 150 | Winston Chase | 41.69 | 10 | A Min | AA: 41.09 (+0.60s | 1.4%) | Utah Valley Aquatics | 07/17/2025 | 2025 UTAGS LC 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.