Western Zone Zone Boys 10 & under - 50 Y Breast
These rankings show the swimmers' placement within their Zone.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 | |
|---|---|---|---|---|---|---|---|---|---|
| 201 | Leland Tsou | 42.53 | 9 | BB Min | A: 42.09 (+0.44s | 1.0%) | Paseo Aquatics Swim Team | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 202 | Bryan HU | 42.54 | 9 | BB Min | A: 42.09 (+0.45s | 1.1%) | Aquazot Swim Club | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 203 | Aleksandr Rybin | 42.56 | 10 | BB Min | A: 42.09 (+0.47s | 1.1%) | King Aquatic Club | 11/22/2025 | 2025 PN November AGI Div 1 (PDST) | |
| 204 | Ari Mobasseri | 42.57 | 8 | BB Min | A: 42.09 (+0.48s | 1.1%) | Aquazot Swim Club | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 205 | James Milchteim | 42.58 | 9 | BB Min | A: 42.09 (+0.49s | 1.2%) | Bay Club Aquatics | 03/06/2026 | 2026 SI 14U AGE GRP CHAMPIONSHIPS | |
| 206 | Carson Yin | 42.60 | 10 | BB Min | A: 42.09 (+0.51s | 1.2%) | Tualatin Hills Swim Club | 05/16/2026 | 2026 John DeRoest Sextathlon Swim Meet | |
| 207 | Adam Ma | 42.61 | 10 | BB Min | A: 42.09 (+0.52s | 1.2%) | California Dolphins Swim Team | 05/17/2026 | Montclair 14 Under Short Course Pentathlon | |
| 208 | Elliott Boland | 42.61 | 10 | BB Min | A: 42.09 (+0.52s | 1.2%) | Academy Swim Club | 02/26/2026 | 2026 HI Hawaiian Swimming SCY AGChamps | |
| 209 | Phinnaeus Johnson | 42.62 | 10 | BB Min | A: 42.09 (+0.53s | 1.2%) | Gilroy Gators Swim Team | 01/16/2026 | 2026 Brian Malick Memorial Z1S Championships | |
| 210 | Kaimana Hashimoto | 42.66 | 10 | BB Min | A: 42.09 (+0.57s | 1.3%) | Splash Aquatics | 04/18/2026 | 44th Annual Harry Mamizuka Invitational | |
| 211 | Tatsumasa Sekine | 42.68 | 9 | BB Min | A: 42.09 (+0.59s | 1.4%) | Santa Clara Swim Club | 03/28/2026 | Swim South Bay | |
| 212 | Reagan Wilsey | 42.70 | 10 | BB Min | A: 42.09 (+0.61s | 1.4%) | Palo Alto Stanford Aquatics | 01/24/2026 | 2026 Zone 1 North Championships | |
| 213 | Orion Blue-Smith | 42.71 | 10 | BB Min | A: 42.09 (+0.62s | 1.5%) | Palo Alto Stanford Aquatics | 12/20/2025 | 2025 PASA Winter Frolic Meet @ PALY HS | |
| 214 | Oliver Shalvey | 42.72 | 10 | BB Min | A: 42.09 (+0.63s | 1.5%) | Excel Aquatics | 01/16/2026 | 2026 TYR Mardi Gras Invite | |
| 215 | Bruce Asmega | 42.73 | 10 | BB Min | A: 42.09 (+0.64s | 1.5%) | Pacifica Sea Lions | 03/07/2026 | BAC Race To AGCs | |
| 216 | Jackson Staples | 42.75 | 10 | BB Min | A: 42.09 (+0.66s | 1.5%) | Las Cruces Aquatic Team | 02/13/2026 | 2026 BD Arctic BLAST Swim Meet | |
| 217 | Henry Goddard | 42.75 | 10 | BB Min | A: 42.09 (+0.66s | 1.5%) | Cascadia Swimming | 08/01/2025 | Big Kahuna 2025 | |
| 218 | Emilio Balcazar | 42.80 | 10 | BB Min | A: 42.09 (+0.71s | 1.7%) | Centro Acuatico Universitario | 12/19/2025 | 2025 BD Leo Cancellare Memorial Swim Meet | |
| 219 | Peter Hofman | 42.81 | 10 | BB Min | A: 42.09 (+0.72s | 1.7%) | Cascade Swim Club | 03/07/2026 | 2026 PDST Mar Pentathlon Last Chance Approved | |
| 220 | Jaden Shin | 42.83 | 10 | BB Min | A: 42.09 (+0.74s | 1.7%) | Stingray Swim Team | 02/20/2026 | 2026 PN SRST Champs Qualifier Approved | |
| 221 | Mason Nguyen | 42.84 | 10 | BB Min | A: 42.09 (+0.75s | 1.8%) | Aquazot Swim Club | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 222 | Nicholas Thach | 42.88 | 10 | BB Min | A: 42.09 (+0.79s | 1.8%) | Oakland Undercurrent Swim Team | 02/28/2026 | VJO Rep The Bay C B A+ 2026 Copied | |
| 223 | Ryan Xie | 42.88 | 10 | BB Min | A: 42.09 (+0.79s | 1.8%) | Cascadia Swimming | 03/19/2026 | 2026 Northwest Region AG Champs Approved | |
| 224 | Yupeng Wang | 42.89 | 10 | BB Min | A: 42.09 (+0.80s | 1.9%) | Monterey Park Manta Rays | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 225 | Aiden Mulcahy | 42.91 | 10 | BB Min | A: 42.09 (+0.82s | 1.9%) | Aulea Swim Club | 02/26/2026 | 2026 HI Hawaiian Swimming SCY AGChamps | |
| 226 | Graham Terzer | 42.92 | 9 | BB Min | A: 42.09 (+0.83s | 1.9%) | The Spartans of La Canada | 12/12/2025 | 2025 CA SCS RAA WAG | |
| 227 | Stewart Bye | 42.96 | 10 | BB Min | A: 42.09 (+0.87s | 2.0%) | Corvallis Aquatic Team | 12/12/2025 | 2025 OR HEAT Age Group Jubilee | |
| 228 | Asher Young | 42.96 | 10 | BB Min | A: 42.09 (+0.87s | 2.0%) | Terrapins Swim Team | 03/20/2026 | SCY Spring Age Group Championships | |
| 229 | Nikoloz Zhorzholiani | 42.97 | 9 | BB Min | A: 42.09 (+0.88s | 2.0%) | Seattle Metropolitan Aquatic C | 02/27/2026 | 2026 PN February AGI, Div 1 Approved | |
| 230 | Preston Tran | 43.03 | 10 | BB Min | A: 42.09 (+0.94s | 2.2%) | Irvine Novaquatics | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 231 | Ashton Chen | 43.03 | 10 | BB Min | A: 42.09 (+0.94s | 2.2%) | Brea Aquatics | 12/12/2025 | 2025 CA SCS RAA WAG | |
| 232 | Logan Yip | 43.03 | 10 | BB Min | A: 42.09 (+0.94s | 2.2%) | South San Francisco Aquatics | 02/21/2026 | Pacific Swimming 10 U SCY Championship | |
| 233 | Robert Mello | 43.13 | 10 | BB Min | A: 42.09 (+1.04s | 2.4%) | Excel Aquatics | 01/16/2026 | 2026 TYR Mardi Gras Invite | |
| 234 | Brian Chou | 43.13 | 9 | BB Min | A: 42.09 (+1.04s | 2.4%) | Irvine Novaquatics | 12/12/2025 | 2025 CA SCS SCAT WAG | |
| 235 | Paxton Marvray | 43.15 | 10 | BB Min | A: 42.09 (+1.06s | 2.5%) | Sawtooth Aquatic Club | 12/20/2025 | 2025 BY Candy Cane Invitational | |
| 236 | Maochen Tan | 43.17 | 10 | BB Min | A: 42.09 (+1.08s | 2.5%) | Mission Viejo Nadadores | 12/12/2025 | 2025 CA SCS RAA WAG | |
| 237 | Luke Chai | 43.17 | 9 | BB Min | A: 42.09 (+1.08s | 2.5%) | Pleasanton Seahawks | 03/28/2026 | PC CDST SC C B BB+ Meet | |
| 238 | Dylan Tian | 43.18 | 8 | BB Min | A: 42.09 (+1.09s | 2.5%) | Santa Clara Swim Club | 03/28/2026 | Swim South Bay | |
| 239 | Logan Snodgrass | 43.21 | 10 | BB Min | A: 42.09 (+1.12s | 2.6%) | Denver Swim Academy | 02/14/2026 | 2026 CO ACES Winter Open | |
| 240 | Lichen Chi | 43.21 | 9 | BB Min | A: 42.09 (+1.12s | 2.6%) | Tualatin Hills Swim Club | 02/21/2026 | 2026 Arena Short Course 10 U Championships | |
| 241 | Austin Mitchell | 43.24 | 10 | BB Min | A: 42.09 (+1.15s | 2.7%) | Valley Aquatics | 02/13/2026 | 34th Annual Lost Dutchman Invitational | |
| 242 | Louis Yu | 43.25 | 8 | BB Min | A: 42.09 (+1.16s | 2.7%) | Santa Clara Swim Club | 02/28/2026 | Swim South Bay | |
| 243 | Eddie Bi | 43.26 | 9 | BB Min | A: 42.09 (+1.17s | 2.7%) | California Dolphins Swim Team | 03/07/2026 | SRVA Last Chance Meet B BB+ | |
| 244 | Wesley Zhang | 43.27 | 10 | BB Min | A: 42.09 (+1.18s | 2.7%) | Santa Clara Swim Club | 02/07/2026 | Valley Splash Short Course C B A Meet | |
| 245 | Henry Moore | 43.29 | 10 | BB Min | A: 42.09 (+1.20s | 2.8%) | Ladera Oaks | 03/28/2026 | Alto Rock The Blocks Invitational 2026 | |
| 246 | Clayton Chester | 43.31 | 10 | BB Min | A: 42.09 (+1.22s | 2.8%) | Heartland Swim Assoc | 01/17/2026 | 2026 SBA All Ages A BB Meet | |
| 247 | Owen Nguyen | 43.37 | 9 | BB Min | A: 42.09 (+1.28s | 3.0%) | Mission Viejo Nadadores | 02/13/2026 | 2026 MVN Lunar AAPI Festival | |
| 248 | Peter Surbeck | 43.39 | 10 | BB Min | A: 42.09 (+1.30s | 3.0%) | Streamliner Aquatics | 12/20/2025 | 2025 BY Candy Cane Invitational | |
| 249 | Aidan Woods | 43.39 | 10 | B Min | BB: 40.09 (+3.30s | 7.6%) | Fort Collins Area Swim Team | 02/27/2026 | 2026 CO CSI SC Age Group Championships | |
| 250 | Cyrus Yang | 43.40 | 10 | BB Min | A: 42.09 (+1.31s | 3.0%) | Quicksilver Swimming | 02/07/2026 | Valley Splash Short Course C B A Meet | |
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.