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 | |
|---|---|---|---|---|---|---|---|---|---|
| 301 | Coen Yazdani | 43.88 | 10 | BB Min | A: 43.09 (+0.79s | 1.8%) | San Antonio Wave | 04/18/2026 | 2026 ST NIST Spring Into Long Course | |
| 302 | Ethan Rana | 43.88 | 10 | BB Min | A: 43.09 (+0.79s | 1.8%) | Highlands Ranch Aquatics | 04/24/2026 | 2026 CO Steve Drozda LC Shotgun | |
| 303 | Marcus Kalmi | 43.92 | 9 | BB Min | A: 43.09 (+0.83s | 1.9%) | Riptide Swim Team | 07/23/2025 | 2025 MN NSAC 10 U LC State Championship | |
| 304 | Graham Terzer | 43.93 | 9 | BB Min | A: 43.09 (+0.84s | 1.9%) | The Spartans of La Canada | 07/23/2025 | 2025 CA SCS Summer A G Champs | |
| 305 | Nathan Gordon | 43.96 | 9 | BB Min | A: 43.09 (+0.87s | 2.0%) | Irvine Novaquatics | 06/12/2025 | 2025 June Age Group Invite | |
| 306 | Logan Fischer | 43.98 | 10 | BB Min | A: 43.09 (+0.89s | 2.0%) | Denver Swim Academy | 07/25/2025 | 2025 CO CSI Age Group Championships | |
| 307 | Henri Simard | 43.99 | 10 | BB Min | A: 43.09 (+0.90s | 2.0%) | Swim Florida | 05/02/2026 | 2026 Sea Dragon May Open | |
| 308 | Isaac Chapman | 44.01 | 10 | BB Min | A: 43.09 (+0.92s | 2.1%) | SwimRVA | 06/27/2024 | NOVA Firecracker Classic | |
| 309 | Christopher Navarro | 44.02 | 10 | BB Min | A: 43.09 (+0.93s | 2.1%) | Kamehameha Swim Club | 05/02/2026 | Keiko Price Sprint Meet Aloha Mile | |
| 310 | Ford Halvorson | 44.02 | 10 | BB Min | A: 43.09 (+0.93s | 2.1%) | Foxjets Swim Team | 05/02/2026 | 2026 MN RSC Pentathlon | |
| 311 | Jayden Liu | 44.03 | 10 | BB Min | A: 43.09 (+0.94s | 2.1%) | Pacific Dragons Swim Team | 05/31/2025 | 2025 PN VAST Summer Sprints And Distance Chal | |
| 312 | Ethan Gaffin | 44.03 | 9 | BB Min | A: 43.09 (+0.94s | 2.1%) | Streamline Aquatics | 05/01/2026 | 2026 ST AAAA 23rd Annual Cinco De Mayo | |
| 313 | Daithi McVeigh | 44.04 | 10 | BB Min | A: 43.09 (+0.95s | 2.2%) | North Star Swim Team | 05/15/2026 | 2026 MN HURR LC Spring Opener | |
| 314 | William Johnson | 44.07 | 9 | BB Min | A: 43.09 (+0.98s | 2.2%) | Swim Florida | 05/02/2026 | 2026 Sea Dragon May Open | |
| 315 | Leo Gazzard | 44.08 | 9 | BB Min | A: 43.09 (+0.99s | 2.2%) | Bellevue Club Swim Team | 05/01/2026 | 2026 PN BC May Flowers Approved | |
| 316 | Maksim Chichetenko | 44.08 | 9 | BB Min | A: 43.09 (+0.99s | 2.2%) | Fast Lane Aquatics | 05/01/2026 | 2026 WFLA SPRING OPEN | |
| 317 | Raizo Copp | 44.09 | 10 | BB Min | A: 43.09 (+1.00s | 2.3%) | King Aquatic Club | 05/15/2026 | 2026 PN IST Sockeye Springtime Madness App | |
| 318 | Artem Shtein | 44.10 | 10 | BB Min | A: 43.09 (+1.01s | 2.3%) | SwimRight Team | 01/17/2026 | 2026 Azura Winter Open LCM Invite | |
| 319 | Luke Rowan | 44.11 | 10 | BB Min | A: 43.09 (+1.02s | 2.3%) | Unattached | 07/31/2025 | 2025 Central Zone 14 Under Championship Mee | |
| 320 | Alex Tang | 44.11 | 10 | BB Min | A: 43.09 (+1.02s | 2.3%) | Aquazot Swim Club | 06/12/2025 | 2025 SCS June AG Invite @ La Mirada Armada | |
| 321 | Ethan Wu | 44.12 | 9 | BB Min | A: 43.09 (+1.03s | 2.3%) | Swim Torrance | 06/12/2025 | 2025 June Age Group Invite | |
| 322 | Michael Riley | 44.12 | 10 | BB Min | A: 43.09 (+1.03s | 2.3%) | Alamo Area Aquatic Association | 05/01/2026 | 2026 ST AAAA 23rd Annual Cinco De Mayo | |
| 323 | James Stitt | 44.14 | 10 | BB Min | A: 43.09 (+1.05s | 2.4%) | Team Pittsburgh Elite Aquatics | 06/12/2025 | Holtrey Summer Classic | |
| 324 | Cole Cadiz | 44.15 | 10 | BB Min | A: 43.09 (+1.06s | 2.4%) | North Coast Aquatics | 04/24/2026 | 2026 SI PS ABB Meet B Group | |
| 325 | Mahkoah Tanap | 44.15 | 10 | BB Min | A: 43.09 (+1.06s | 2.4%) | Paseo Aquatics Swim Team | 07/23/2025 | 2025 CA SCS Summer A G Champs | |
| 326 | Duke Guo | 44.15 | 9 | BB Min | A: 43.09 (+1.06s | 2.4%) | McAllen Swim Club | 04/11/2026 | 2026 ST LC BAS April Swim Meet | |
| 327 | Aidan Woods | 44.17 | 10 | B Min | BB: 41.09 (+3.08s | 7.0%) | Fort Collins Area Swim Team | 04/11/2026 | 2026 CO FAST Vs CUDA Dua; | |
| 328 | Andy Wang | 44.21 | 10 | BB Min | A: 43.09 (+1.12s | 2.5%) | Tualatin Hills Swim Club | 06/26/2025 | 2025 Howard Jones Open | |
| 329 | Aiden Mulcahy | 44.21 | 10 | BB Min | A: 43.09 (+1.12s | 2.5%) | Aulea Swim Club | 05/02/2026 | Keiko Price Sprint Meet Aloha Mile | |
| 330 | Ashton VanKeulen | 44.23 | 9 | BB Min | A: 43.09 (+1.14s | 2.6%) | Sioux Falls Swim Team | 07/18/2025 | 2025 SD State Long Course Meet | |
| 331 | Eric Ruan | 44.23 | 9 | BB Min | A: 43.09 (+1.14s | 2.6%) | South East Metro Sharks | 07/23/2025 | 2025 MN NSAC 10 U LC State Championship | |
| 332 | Danylo Marshchivskyi | 44.25 | 8 | BB Min | A: 43.09 (+1.16s | 2.6%) | Blast Sharks | 07/24/2025 | 2025 CA SCS Summer A G Champs CANY | |
| 333 | Arthur Shackelton | 44.27 | 9 | BB Min | A: 43.09 (+1.18s | 2.7%) | Lakeridge Swim Team | 06/20/2025 | Reno Aquatic Club Gamble | |
| 334 | Eames Meek | 44.27 | 10 | BB Min | A: 43.09 (+1.18s | 2.7%) | Highlander Aquatic Club | 05/15/2026 | 2026 PA Long Course Invite | |
| 335 | Brett Baker | 44.29 | 10 | BB Min | A: 43.09 (+1.20s | 2.7%) | Burlingame Aquatics | 06/06/2025 | BAC C B A Meet | |
| 336 | Samuel Leven | 44.29 | 10 | BB Min | A: 43.09 (+1.20s | 2.7%) | Alamo Area Aquatic Association | 05/01/2026 | 2026 ST AAAA 23rd Annual Cinco De Mayo | |
| 337 | Tatsumasa Sekine | 44.31 | 9 | BB Min | A: 43.09 (+1.22s | 2.8%) | Santa Clara Swim Club | 05/23/2025 | Zone 1 South May Firecracker 500 | |
| 338 | Matthew Ko | 44.31 | 10 | BB Min | A: 43.09 (+1.22s | 2.8%) | Aspire Aquatics of Colorado | 04/24/2026 | 2026 CO Arena Catch Me If You Can | |
| 339 | Charlie Lockett | 44.31 | 10 | BB Min | A: 43.09 (+1.22s | 2.8%) | Nitro Swimming | 07/10/2025 | 2025 ST AAAA STAGS LC Championship | |
| 340 | Jay Kowren | 44.33 | 10 | BB Min | A: 43.09 (+1.24s | 2.8%) | Bainbridge Island Swim Club | 04/24/2026 | 2026 PN SMAC Spring Showers LC Challenge | |
| 341 | Saien Wu | 44.35 | 10 | BB Min | A: 43.09 (+1.26s | 2.8%) | Bellevue Club Swim Team | 05/01/2026 | 2026 PN BC May Flowers Approved | |
| 342 | Kyle Wang | 44.35 | 10 | BB Min | A: 43.09 (+1.26s | 2.8%) | Freedom Aquatics | 08/06/2025 | 2025 Summer Elite Showcase | |
| 343 | Samuel Evanovich | 44.36 | 10 | BB Min | A: 43.09 (+1.27s | 2.9%) | Unattached | 05/16/2026 | BIG ISLAND SWIMMING @ KCAC | |
| 344 | Fletcher Sumner | 44.37 | 10 | BB Min | A: 43.09 (+1.28s | 2.9%) | Mission Aurora Colorado Swimmi | 04/12/2026 | 2026 CO NJ SBL Pentathlon 12 U | |
| 345 | Jair Ortega | 44.38 | 10 | BB Min | A: 43.09 (+1.29s | 2.9%) | Austin Swim Club | 06/13/2025 | 2025 ST ASC Firecracker | |
| 346 | Emry Lotito | 44.38 | 10 | BB Min | A: 43.09 (+1.29s | 2.9%) | West Florida Lightning Aquatic | 05/01/2026 | 2026 WFLA SPRING OPEN | |
| 347 | Owen Laidlaw | 44.38 | 9 | BB Min | A: 43.09 (+1.29s | 2.9%) | Island Aquatics | 05/02/2026 | 2026 MAGSA LCM B 1 Meet | |
| 348 | Jason Feng | 44.39 | 10 | BB Min | A: 43.09 (+1.30s | 2.9%) | Boys & Girls Club of SF | 04/19/2025 | Alto Spring Jam Meet | |
| 349 | Grant Weigle | 44.40 | 10 | BB Min | A: 43.09 (+1.31s | 3.0%) | Aces Swim Club | 04/12/2026 | 2026 CO NJ SBL Pentathlon 12 U | |
| 350 | Jercey Zhao | 44.41 | 10 | BB Min | A: 43.09 (+1.32s | 3.0%) | Bellevue Club Swim Team | 05/01/2026 | 2026 PN BC May Flowers Approved | |
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.