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 | Kevin Nguyen | 42.04 | 10 | A Min | AA: 40.19 (+1.85s | 4.4%) | Legacy Aquatics | 03/19/2026 | 2026 NW Region Age Group Champs Approved | |
| 202 | Zackary Chuck | 42.09 | 10 | A Min | AA: 40.19 (+1.90s | 4.5%) | Boys & Girls Club of SF | 10/11/2025 | SSF October Splash C B A+ Meet | |
| 203 | Mark Kiselev | 42.12 | 9 | BB Min | A: 42.09 (+0.03s | 0.1%) | Royal Swim Team | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 204 | Arthur Shackelton | 42.13 | 9 | BB Min | A: 42.09 (+0.04s | 0.1%) | Lakeridge Swim Team | 02/06/2026 | 2026 Valentines Day Age Group Open | |
| 205 | Cheng Dou | 42.17 | 10 | BB Min | A: 42.09 (+0.08s | 0.2%) | Alto Swim Club | 03/20/2026 | SCY Spring Age Group Championships | |
| 206 | Yusen Wang | 42.20 | 9 | BB Min | A: 42.09 (+0.11s | 0.3%) | Irvine Novaquatics | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 207 | Anderson Bradley | 42.21 | 10 | BB Min | A: 42.09 (+0.12s | 0.3%) | Coastal Machine Aquatics Club | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 208 | Jayden Zhen | 42.22 | 10 | BB Min | A: 42.09 (+0.13s | 0.3%) | Adrienne C Nelson | 02/15/2025 | 2025 OR HS 6a 4 | |
| 209 | Mason Folster | 42.22 | 10 | BB Min | A: 42.09 (+0.13s | 0.3%) | Gold Medal Swim Club | 02/13/2026 | 34th Annual Lost Dutchman Invitational | |
| 210 | Enzo Harter | 42.23 | 10 | BB Min | A: 42.09 (+0.14s | 0.3%) | Beaverton Area Aquatics Club | 10/17/2025 | 2025 CST Harvest Open | |
| 211 | Kaizen Toung | 42.24 | 9 | BB Min | A: 42.09 (+0.15s | 0.4%) | Orinda Aquatics | 11/08/2025 | Brentwood Seawolves SCY C B BB+ | |
| 212 | Phillippe Choi | 42.27 | 10 | BB Min | A: 42.09 (+0.18s | 0.4%) | Blast Sharks | 12/12/2025 | 2025 CA SCS RAA WAG | |
| 213 | Jake McNair | 42.34 | 9 | BB Min | A: 42.09 (+0.25s | 0.6%) | Bellevue Club Swim Team | 03/19/2026 | 2026 Northwest Region AG Champs Approved | |
| 214 | Mason Kim | 42.35 | 10 | BB Min | A: 42.09 (+0.26s | 0.6%) | Maywood Sparks Swim Team | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 215 | Mason Sovich | 42.41 | 9 | BB Min | A: 42.09 (+0.32s | 0.8%) | Olympic Cascade Aquatics | 03/19/2026 | 2026 Northwest Region AG Champs Approved | |
| 216 | Aiden Kiatrungrit | 42.43 | 10 | BB Min | A: 42.09 (+0.34s | 0.8%) | South San Francisco Aquatics | 12/06/2025 | DCD Winter Holiday Splash CBA+ | |
| 217 | Hawx Hansen | 42.43 | 10 | BB Min | A: 42.09 (+0.34s | 0.8%) | Wasatch Front Fish Market | 12/29/2025 | 60th Kearns Holiday Open Invitational | |
| 218 | Daniel Nagaoka | 42.44 | 10 | BB Min | A: 42.09 (+0.35s | 0.8%) | Quicksilver Swimming | 03/20/2026 | SCY Spring Age Group Championships | |
| 219 | Herman Wollman | 42.44 | 10 | BB Min | A: 42.09 (+0.35s | 0.8%) | Gold Medal Swim Club | 02/13/2026 | 34th Annual Lost Dutchman Invitational | |
| 220 | Everett Edquid | 42.46 | 10 | BB Min | A: 42.09 (+0.37s | 0.9%) | Aquabear Swim Club | 02/13/2026 | 34th Annual Lost Dutchman Invitational | |
| 221 | William Power | 42.47 | 10 | BB Min | A: 42.09 (+0.38s | 0.9%) | Monterey Bay Swim Club | 07/18/2025 | CVAL | |
| 222 | Leo Ioffe | 42.49 | 9 | BB Min | A: 42.09 (+0.40s | 0.9%) | Santa Clara Swim Club | 02/28/2026 | Swim South Bay | |
| 223 | Zhouhan Yang | 42.51 | 10 | BB Min | A: 42.09 (+0.42s | 1.0%) | Alto Swim Club | 03/28/2026 | Alto Rock The Blocks Invitational 2026 | |
| 224 | Jonathan Nelson | 42.52 | 10 | BB Min | A: 42.09 (+0.43s | 1.0%) | Utah Valley Aquatics | 12/26/2024 | 59th Kearns Holiday Open Invitational | |
| 225 | 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 | |
| 226 | 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 | |
| 227 | 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) | |
| 228 | 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 | |
| 229 | 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 | |
| 230 | 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 | |
| 231 | 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 | |
| 232 | Lucas Pan | 42.66 | 9 | BB Min | A: 42.09 (+0.57s | 1.3%) | Santa Clara Swim Club | 11/08/2025 | Folsom Classic 2025 | |
| 233 | Tatsumasa Sekine | 42.68 | 9 | BB Min | A: 42.09 (+0.59s | 1.4%) | Santa Clara Swim Club | 03/28/2026 | Swim South Bay | |
| 234 | 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 | |
| 235 | 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 | |
| 236 | Oliver Shalvey | 42.72 | 10 | BB Min | A: 42.09 (+0.63s | 1.5%) | Excel Aquatics | 01/16/2026 | 2026 TYR Mardi Gras Invite | |
| 237 | Bruce Asmega | 42.73 | 10 | BB Min | A: 42.09 (+0.64s | 1.5%) | Pacifica Sea Lions | 03/07/2026 | BAC Race To AGCs | |
| 238 | 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 | |
| 239 | Henry Goddard | 42.75 | 10 | BB Min | A: 42.09 (+0.66s | 1.5%) | Cascadia Swimming | 08/01/2025 | Big Kahuna 2025 | |
| 240 | Adam Ma | 42.79 | 10 | BB Min | A: 42.09 (+0.70s | 1.6%) | California Dolphins Swim Team | 02/20/2026 | Pacific Swim SCY C B BB+ Meet Hosted By TERA | |
| 241 | 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 | |
| 242 | 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 | |
| 243 | 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 | |
| 244 | Apollo Valdriz | 42.84 | 10 | BB Min | A: 42.09 (+0.75s | 1.8%) | Circle City Aquatics | 03/12/2026 | 2026 SCS Spring Age Group Champs @ RMDA Cop | |
| 245 | 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 | |
| 246 | 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 | |
| 247 | 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 | |
| 248 | 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 | |
| 249 | 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 | |
| 250 | 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 | |
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.