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
401 Lucas De Soto Mejias 46.17 9 BB Min A: 43.09 (+3.08s | 6.7%) Bolles School Sharks 07/25/2025 2025 Area 1 LCM Championships
402 Yihong Xiang 46.18 9 BB Min A: 43.09 (+3.09s | 6.7%) Tualatin Hills Swim Club 05/02/2025 2025 THSC Spring Invitational
403 Liam Pennisi 46.20 10 BB Min A: 43.09 (+3.11s | 6.7%) Aquazot Swim Club 07/24/2025 2025 CA SCS RAA Summer A G Champs
404 Lichen Chi 46.22 8 BB Min A: 43.09 (+3.13s | 6.8%) Tualatin Hills Swim Club 07/12/2025 2025 OSI Arena Summer LC 10 U Championships
405 Bryant Stringham 46.22 10 BB Min A: 43.09 (+3.13s | 6.8%) Olympus Aquatics 07/17/2025 2025 UTAGS LC Championships
406 Reid Kelly 46.28 9 BB Min A: 43.09 (+3.19s | 6.9%) Front Range Barracudas 07/11/2025 2025 CO NCS Gold District Championships
407 Nolan Giannini 46.28 8 BB Min A: 43.09 (+3.19s | 6.9%) Puma Aquatic Team 07/16/2025 Renee And Jim Patterson Meet 2025
25 Back
46.28
46.28
50 Back
0.00
46.28
50 Back
46.28
408 Landon Wang 46.28 9 BB Min A: 43.09 (+3.19s | 6.9%) Seattle Metropolitan Aquatic C 05/29/2025 2025 IE VS Apple Capital
409 Henry Goddard 46.30 9 BB Min A: 43.09 (+3.21s | 6.9%) Cascadia Swimming 05/30/2025 LA OPEN 2025
410 Ethan Rana 46.30 10 BB Min A: 43.09 (+3.21s | 6.9%) Highlands Ranch Aquatics 07/25/2025 2025 CO CSI Age Group Championships
411 Shenukha Alahakoon 46.34 9 BB Min A: 43.09 (+3.25s | 7.0%) Tualatin Hills Swim Club 05/02/2025 2025 THSC Spring Invitational
412 Emmett Olsen 46.37 8 BB Min A: 43.09 (+3.28s | 7.1%) Edina Swim Club 07/23/2025 2025 MN NSAC 10 U LC State Championship
413 Louis Yu 46.38 7 BB Min A: 43.09 (+3.29s | 7.1%) Santa Clara Swim Club 07/19/2025 Santa Clara Valley Splash Block Party
414 Noah Wu 46.39 9 BB Min A: 43.09 (+3.30s | 7.1%) Milpitas Aquatic Club 05/23/2025 Zone 1 South May Firecracker 500
415 Sebastian Camacho Lopez 46.43 10 BB Min A: 43.09 (+3.34s | 7.2%) Titanes de Tym 05/02/2025 2025 ST 22nd Annual Cinco De Mayo
416 Robert Obermeyer 46.43 9 BB Min A: 43.09 (+3.34s | 7.2%) Albany Armada Aquatics 06/08/2024 Orinda Aquatics LC C B BB+ Meet
417 Federico Cocchiglia 46.44 10 BB Min A: 43.09 (+3.35s | 7.2%) Mercy HealthPlex Sea Wolves 08/06/2025 2025 Summer Elite Showcase
418 Henry Luevano 46.45 8 BB Min A: 43.09 (+3.36s | 7.2%) Aces Swim Club 06/27/2025 2025 CO Zone 2 VMAC Meet
419 Sebastian Horn-Rios 46.46 9 BB Min A: 43.09 (+3.37s | 7.3%) T2 Aquatics 04/11/2025 2025 GCST Spring Invite
420 Alfie Mobbs 46.48 8 BB Min A: 43.09 (+3.39s | 7.3%) Lake Oswego Swim Club 07/12/2025 2025 OSI Arena Summer LC 10 U Championships
421 Boxuan Yu 46.48 10 BB Min A: 43.09 (+3.39s | 7.3%) Pacific Dragons Swim Team 07/11/2025 2025 PN OCA July Jamboree Invitational
422 Samuel Wacek 46.48 9 BB Min A: 43.09 (+3.39s | 7.3%) Alexandria Swim Club 07/18/2025 2025 MN TUNA Minnesota Regional Championship
423 George Peters 46.50 9 BB Min A: 43.09 (+3.41s | 7.3%) Rochester Swim Club 07/18/2025 2025 MN MTKA Minnesota Regional Championship
424 Eames Meek 46.50 9 BB Min A: 43.09 (+3.41s | 7.3%) Highlander Aquatic Club 06/12/2025 2025 RAFC Summer Solstice
425 Brayden Blaine 46.50 10 BB Min A: 43.09 (+3.41s | 7.3%) Montrose Marlins Swim Club 07/25/2025 2025 CO CSI Age Group Championships
426 Enzo Harter 46.51 9 BB Min A: 43.09 (+3.42s | 7.4%) Beaverton Area Aquatics Club 05/30/2025 LA OPEN 2025
427 Idhaant Kamat 46.52 10 BB Min A: 43.09 (+3.43s | 7.4%) Horizon Swimming 07/16/2025 Renee And Jim Patterson Meet 2025
25 Back
46.52
46.52
50 Back
0.00
46.52
50 Back
46.52
428 Jeremy Zhao 46.52 8 BB Min A: 43.09 (+3.43s | 7.4%) Quicksilver Swimming 06/27/2025 Valley Splash
429 Thomas Shearer 46.54 9 BB Min A: 43.09 (+3.45s | 7.4%) Sailfish 04/05/2025 2025 ST TXLA 10 U Long Course Kick Off
430 Rylan Brill 46.54 9 BB Min A: 43.09 (+3.45s | 7.4%) CAC Stingrays Swim Team 07/25/2025 2025 CO CSI Age Group Championships
431 Darren Zhao 46.54 9 BB Min A: 43.09 (+3.45s | 7.4%) Santa Clara Swim Club 06/27/2025 Valley Splash
432 Andrew Knol 46.55 9 BB Min A: 43.09 (+3.46s | 7.4%) Pacific Swim 07/24/2025 2025 SI LC AG CHAMPS
433 Adrian Pascu 46.56 8 BB Min A: 43.09 (+3.47s | 7.5%) Gold\\\\\\'s Aquatics Club (Camas) 07/12/2025 2025 OSI Arena Summer LC 10 U Championships
434 Patrick Comer 46.56 10 BB Min A: 43.09 (+3.47s | 7.5%) Westlake Aquatic Facility 06/27/2025 2025 ST HPAC Long Course STX Championship
435 John Stetson 46.57 9 BB Min A: 43.09 (+3.48s | 7.5%) Bolles School Sharks 07/25/2025 2025 Area 1 LCM Championships
436 Oliver Morris 46.57 8 BB Min A: 43.09 (+3.48s | 7.5%) Lake Oswego Swim Club 07/12/2025 2025 OSI Arena Summer LC 10 U Championships
437 James Zanutto 46.57 6 BB Min A: 43.09 (+3.48s | 7.5%) Burlingame Aquatics 05/18/2024 Alto May Cray Invitational
438 Parker Sampson 46.57 9 BB Min A: 43.09 (+3.48s | 7.5%) Denver Swim Academy 06/19/2025 2025 CO ACES Summer Invite
439 Mario Aoki 46.59 8 BB Min A: 43.09 (+3.50s | 7.5%) Falfins Swimming 06/20/2025 2025 Falfins Long Course Open
440 Andrew Szalay 46.63 9 BB Min A: 43.09 (+3.54s | 7.6%) Austin Swim Club 06/27/2025 2025 ST HPAC Long Course STX Championship
441 Sebastian Uy 46.63 10 BB Min A: 43.09 (+3.54s | 7.6%) King Aquatic Club 07/24/2025 2025 PN LC 12 U Championships
442 Adrian Mendoza 46.64 8 BB Min A: 43.09 (+3.55s | 7.6%) Front Range Barracudas 06/21/2024 2024 RST Rushmore Classic Swim Meet
443 Owen Nguyen 46.64 9 BB Min A: 43.09 (+3.55s | 7.6%) Mission Viejo Nadadores 06/12/2025 2025 SCS June AG Invite @ La Mirada Armada
444 Jackson Volpe 46.64 9 BB Min A: 43.09 (+3.55s | 7.6%) Lake Erie Silver Dolphins 07/12/2025 LSSC Avon Classic
445 Hunter Perfect 46.67 9 BB Min A: 43.09 (+3.58s | 7.7%) River Falls Swim Club 07/18/2025 2025 MN STRM Minnesota Regional Championship
446 Ransom Schwartz 46.68 9 BB Min A: 43.09 (+3.59s | 7.7%) Swim Florida 06/21/2025 2025 T2 June Saturday Showcase
447 Liam Reyes 46.70 9 BB Min A: 43.09 (+3.61s | 7.7%) Sparks Piranhas Swim Team 05/23/2025 2025 Intermountain Classic Long Course Meet
448 Jonathan Li 46.73 7 BB Min A: 43.09 (+3.64s | 7.8%) Brea Aquatics 07/23/2025 2025 CA SCS Summer A G Champs
449 Luke Ready 46.73 8 BB Min A: 43.09 (+3.64s | 7.8%) Kennebec Valley YMCA 07/11/2024 2024 ME 3rd Annual LCM Championships
450 Ethan Gaffin 46.73 8 BB Min A: 43.09 (+3.64s | 7.8%) Alamo Area Aquatic Association 05/02/2025 2025 ST 22nd Annual Cinco De Mayo

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.