New! ScoreMeUp is now available on the App Store. Download the iOS app →

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
3551 Arthur Cahoy 56.50 9 B: 55.39 (+1.11s | 2.0%) Palo Alto Stanford Aquatics 05/17/2025 2025 LAMV SCM C B A+
3552 Ryan Guzman 56.51 10 B: 55.39 (+1.12s | 2.0%) Southwest Aquatic Warriors 06/11/2026 2026 ST NIST George Block Invitational
3553 Luke Hahn 56.51 8 B: 55.39 (+1.12s | 2.0%) Meadowbrook Swim Team 07/17/2026 2026 MD Long Course Last Chance Meet
3554 Allen Gao 56.52 7 B: 55.39 (+1.13s | 2.0%) Weymouth Club Waves 06/26/2026 2026 NE YNS June Prelims Finals Meet
3555 Jayson DaSilva 56.52 9 B: 55.39 (+1.13s | 2.0%) Sarasota Tsunami Swim Team 05/02/2026 2026 Sea Dragon May Open
3556 Benjamin de Oliveira 56.52 9 B: 55.39 (+1.13s | 2.0%) South Lake Aquatic Club 06/26/2026 2026 SPA S SEMINOLE SUNRISE LANES SWIM MEET
3557 Nolan Chitwood 56.52 10 B: 55.39 (+1.13s | 2.0%) Parkway-Rockwood Gateway Swim 05/29/2026 2026 Meet Me In St Louis Invite
3558 Jaxon Culver 56.54 7 B: 55.39 (+1.15s | 2.0%) Brownsville Aquatics 05/16/2026 2026 ST LC BAS May Swim Meet
3559 Lucas Badillo McDonald 56.54 9 B: 55.39 (+1.15s | 2.0%) West Express Swim Team 07/17/2026 2026 MN MAN Minnesota Regional Championship
3560 Leonidas Rodriguez 56.54 9 B: 55.39 (+1.15s | 2.0%) Bolles School Sharks 05/22/2026 EAJ Mayhem 2026
3561 Everett Chen 56.55 9 B: 55.39 (+1.16s | 2.1%) Nitro Swimming 06/20/2026 2026 ST NTRO LC Summer Classic
3562 Samuel Wang 56.55 7 B: 55.39 (+1.16s | 2.1%) Alamo Area Aquatic Association 05/01/2026 2026 ST AAAA 23rd Annual Cinco De Mayo
3563 Adrian Williams 56.55 9 B: 55.39 (+1.16s | 2.1%) Piranha Swimming 05/30/2025 VJO S Tuffy Williams Summer Kickoff Classic
3564 Dennis Liu 56.55 10 B: 55.39 (+1.16s | 2.1%) Milpitas Aquatic Club 07/19/2025 Alto Last Splash
3565 Zachary Sun 56.56 7 B: 55.39 (+1.17s | 2.1%) Tiburon Swim Club 04/24/2026 2026 NE YNS LCM IMX IMR Meet
3566 Taylon Zhu 56.56 8 B: 55.39 (+1.17s | 2.1%) Otter Swim Club 06/12/2026 2026 DACA LC CBA Meet
3567 Colson Mou 56.57 9 B: 55.39 (+1.18s | 2.1%) South San Francisco Aquatics 05/29/2026 VJO S Tuffy Williams Summer Kickoff Classic
3568 Mason Majcher 56.58 8 B: 55.39 (+1.19s | 2.1%) Treasure Coast Aquatics 06/13/2026 2026 TCA Aaron Vaughn Memorial
3569 Sanav Nirmal 56.58 10 B: 55.39 (+1.19s | 2.1%) Santa Clara Swim Club 06/27/2026 2026 Santa Clara LC Race To Age Group Champs
3570 Mokshatej Domarouthu 56.58 10 B: 55.39 (+1.19s | 2.1%) Lakeside Swim Team 05/15/2026 2026 Triton Summer Launch
3571 William Davare 56.58 7 B: 55.39 (+1.19s | 2.1%) Berkeley Aquatic Club 04/25/2026 2026 WAVE Sprint Into LC
3572 Zai Russell 56.58 10 B: 55.39 (+1.19s | 2.1%) Sarasota Sharks 05/16/2025 2025 SYS Memorial Meet
3573 Nicholas Mumper 56.59 9 B: 55.39 (+1.20s | 2.1%) Fox Swim Club 05/29/2026 2026 FOX Speedo Summer Spectacular Meet
3574 Carter Lohser 56.59 9 B: 55.39 (+1.20s | 2.1%) Unattached 05/23/2025 2025 T2 Aquatics Norris Foundation LC Meet
3575 Liam Cabaccang 56.59 9 B: 55.39 (+1.20s | 2.1%) Aloha Aquatics Association 05/02/2026 Keiko Price Sprint Meet Aloha Mile
3576 Emmett Farmer 56.59 9 B: 55.39 (+1.20s | 2.1%) Tualatin Hills Swim Club 06/12/2026 2026 THSC June Open
3577 Noah Amrouch 56.60 9 B: 55.39 (+1.21s | 2.1%) United Swim Club 06/06/2025 2025 MAKOS Summer Splash
3578 Wesley Hu 56.60 10 B: 55.39 (+1.21s | 2.1%) Santa Clara Swim Club 06/27/2025 Valley Splash
3579 Canon Antonich 56.60 8 B: 55.39 (+1.21s | 2.1%) Lewis Clark Neptune Swim Team 05/15/2026 2026 Chris Engledow Memorial Meet
3580 Guy McCurdy 56.61 9 B: 55.39 (+1.22s | 2.2%) Treasure Coast Aquatics 06/07/2025 2025 TCA Aaron Vaughn Memorial
3581 Ayden Peng 56.61 9 B: 55.39 (+1.22s | 2.2%) Raleigh Swimming Association 06/13/2026 2026 MOR Liberty Meet
3582 William Dillon 56.61 9 B: 55.39 (+1.22s | 2.2%) Raleigh Swimming Association 04/24/2026 2026 RSA Warm Up To LC Copied Copied
3583 Mateo Jimenez 56.61 9 B: 55.39 (+1.22s | 2.2%) Huntsville Swim Association 04/18/2026 HSA April LC Meet
3584 Julian Franco Moya 56.62 10 B: 55.39 (+1.23s | 2.2%) Greater Pensacola Aquatic Club 06/05/2026 2026 GPAC Tom Lalor Invitational
3585 Mark Molochko 56.62 9 B: 55.39 (+1.23s | 2.2%) San Ramon Valley Aquatics 06/21/2025 NVST Last Chance AG Champs Summer Plunge 2025
3586 Leonardo Jimenez 56.63 10 B: 55.39 (+1.24s | 2.2%) SOL Swim Team 06/06/2026 2026 SI SOL Splash And Dash Max Jun 6 7
25 Back
1:00.89
1:00.89
50 Back
-4.-26
56.63
50 Back
56.63
3587 Mathias Salayandia 56.63 10 B: 55.39 (+1.24s | 2.2%) EL Paso Border Land Swim Team 05/16/2026 2026 BD SWAT School S Out Summer Bash
3588 Sebastian Marshall 56.64 9 B: 55.39 (+1.25s | 2.2%) Unattached 06/07/2025 Orinda Aquatics LC C B BB+ Meet
3589 Oren Alfiero 56.64 7 B: 55.39 (+1.25s | 2.2%) Marlins Of Raleigh 06/26/2026 2026 MOR Long Course Qualifier
3590 Calvin Withrow 56.64 9 B: 55.39 (+1.25s | 2.2%) North Coast Aquatics 05/23/2026 SI 2026 TAC CSTE All Ages NTS Meet
3591 Haoxuan Qiao 56.65 9 B: 55.39 (+1.26s | 2.2%) Y in Central Maryland Blue Cra 07/17/2026 2026 MD Long Course Last Chance Meet
3592 Colin Chin 56.65 9 B: 55.39 (+1.26s | 2.2%) Highlander Aquatic Club 05/15/2026 2026 PA Long Course Invite
3593 Owen Deaton 56.65 8 B: 55.39 (+1.26s | 2.2%) Wtrc Sharks 05/15/2026 Kentucky Aquatics Derby Classic
3594 Ram Satam 56.65 10 B: 55.39 (+1.26s | 2.2%) Rochester Swim Club 07/18/2025 2025 MN MTKA Minnesota Regional Championship
3595 Christopher Walker 56.65 8 B: 55.39 (+1.26s | 2.2%) Salem Swim Club 06/05/2026 2026 CST Summer Invitational
3596 Julio Garza 56.66 8 B: 55.39 (+1.27s | 2.2%) Brownsville Aquatics 04/11/2026 2026 ST LC BAS April Swim Meet
3597 Adrian Real 56.67 9 B: 55.39 (+1.28s | 2.3%) Race Swami 06/06/2025 Speed Lake City 2025
25 Back
22.48
22.48
50 Back
34.19
56.67
50 Back
56.67
3598 Leif Chang 56.67 10 B: 55.39 (+1.28s | 2.3%) Rancho San Dieguito 06/06/2026 2026 SI JBST SPLASH DASH MAX
3599 Nate Smith 56.67 10 B: 55.39 (+1.28s | 2.3%) Sparks Piranhas Swim Team 07/10/2026 2026 NNA Silver State Championships
3600 Desmond Kobek 56.68 10 B: 55.39 (+1.29s | 2.3%) Great Illinois Swimmers 08/06/2025 2025 Summer Elite Showcase
25 Back
56.73
56.73
50 Back
0.-5
56.68
50 Back
56.68

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.