Pacific Swimming Boys 10 & under - 50 Y Breast
These rankings show the swimmers' placement within their Local Swimming Committee (LSC).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 | |
|---|---|---|---|---|---|---|---|---|---|
| 51 | Mateo Sison | 41.78 | 10 | A Min | AA: 40.19 (+1.59s | 3.8%) | San Ramon Valley Aquatics | 07/26/2025 | Zone 2 Summer Championships | |
| 52 | Ishaan Karunanayake | 41.79 | 10 | A Min | AA: 40.19 (+1.60s | 3.8%) | Alto Swim Club | 03/28/2026 | Alto Rock The Blocks Invitational 2026 | |
| 53 | Yixuan Zhu | 41.82 | 10 | A Min | AA: 40.19 (+1.63s | 3.9%) | Pleasanton Seahawks | 03/28/2026 | PC CDST SC C B BB+ Meet | |
| 54 | Alexander Fang | 42.00 | 10 | A Min | AA: 40.19 (+1.81s | 4.3%) | Reno Aquatic Club | 01/16/2026 | 2026 Blizzard Blast Swim Meet | |
| 55 | Daniel Heilman | 42.00 | 10 | A Min | AA: 40.19 (+1.81s | 4.3%) | San Francisco Seals Swim Team | 02/21/2026 | Pacific Swimming 10 U SCY Championship | |
| 56 | 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 | |
| 57 | 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 | |
| 58 | 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 | |
| 59 | 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+ | |
| 60 | 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+ | |
| 61 | Daniel Nagaoka | 42.44 | 10 | BB Min | A: 42.09 (+0.35s | 0.8%) | Quicksilver Swimming | 03/20/2026 | SCY Spring Age Group Championships | |
| 62 | William Power | 42.47 | 10 | BB Min | A: 42.09 (+0.38s | 0.9%) | Monterey Bay Swim Club | 07/18/2025 | CVAL | |
| 63 | Leo Ioffe | 42.49 | 9 | BB Min | A: 42.09 (+0.40s | 0.9%) | Santa Clara Swim Club | 02/28/2026 | Swim South Bay | |
| 64 | 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 | |
| 65 | 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 | |
| 66 | Lucas Pan | 42.66 | 9 | BB Min | A: 42.09 (+0.57s | 1.3%) | Santa Clara Swim Club | 11/08/2025 | Folsom Classic 2025 | |
| 67 | Tatsumasa Sekine | 42.68 | 9 | BB Min | A: 42.09 (+0.59s | 1.4%) | Santa Clara Swim Club | 03/28/2026 | Swim South Bay | |
| 68 | 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 | |
| 69 | 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 | |
| 70 | Bruce Asmega | 42.73 | 10 | BB Min | A: 42.09 (+0.64s | 1.5%) | Pacifica Sea Lions | 03/07/2026 | BAC Race To AGCs | |
| 71 | 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 | |
| 72 | 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 | |
| 73 | 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 | |
| 74 | 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 | |
| 75 | 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 | |
| 76 | Dylan Tian | 43.18 | 8 | BB Min | A: 42.09 (+1.09s | 2.5%) | Santa Clara Swim Club | 03/28/2026 | Swim South Bay | |
| 77 | Jayden Zhu | 43.20 | 10 | BB Min | A: 42.09 (+1.11s | 2.6%) | Otter Swim Club | 02/21/2026 | Pacific Swimming 10 U SCY Championship | |
| 78 | Louis Yu | 43.25 | 8 | BB Min | A: 42.09 (+1.16s | 2.7%) | Santa Clara Swim Club | 02/28/2026 | Swim South Bay | |
| 79 | 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+ | |
| 80 | 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 | |
| 81 | 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 | |
| 82 | 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 | |
| 83 | Ozzy Su | 43.46 | 10 | BB Min | A: 42.09 (+1.37s | 3.2%) | Quicksilver Swimming | 01/16/2026 | 2026 Brian Malick Memorial Z1S Championships | |
| 84 | Daniel Platon | 43.87 | 10 | BB Min | A: 42.09 (+1.78s | 4.1%) | Alto Swim Club | 01/24/2026 | 2026 Zone 1 North Championships | |
| 85 | Daniel Kalinovski | 43.96 | 10 | BB Min | A: 42.09 (+1.87s | 4.3%) | Otter Swim Club | 03/07/2026 | 2026 PASA Last Chance For JO S | |
| 86 | Isaiah Fadillah | 43.97 | 10 | BB Min | A: 42.09 (+1.88s | 4.3%) | California Dolphins Swim Team | 03/28/2026 | PC CDST SC C B BB+ Meet | |
| 87 | Elias Lien | 44.00 | 8 | BB Min | A: 42.09 (+1.91s | 4.3%) | Santa Clara Swim Club | 02/28/2026 | Swim South Bay | |
| 88 | Jay Dai | 44.01 | 10 | BB Min | A: 42.09 (+1.92s | 4.4%) | Alto Swim Club | 12/19/2025 | ALTO Candy Cane Classic | |
| 89 | Penghao Yu | 44.04 | 10 | BB Min | A: 42.09 (+1.95s | 4.4%) | Palo Alto Stanford Aquatics | 03/07/2026 | 2026 PASA Last Chance For JO S | |
| 90 | Elliott Lindley | 44.10 | 9 | BB Min | A: 42.09 (+2.01s | 4.6%) | Los Altos Mountain View Aquati | 02/21/2026 | Pacific Swimming 10 U SCY Championship | |
| 91 | Ethan Zhu | 44.19 | 10 | BB Min | A: 42.09 (+2.10s | 4.8%) | DeAnza Cupertino Aquatics | 12/06/2025 | Alto Dec 6 7 CBA | |
| 92 | Teddy Nichols | 44.22 | 10 | BB Min | A: 42.09 (+2.13s | 4.8%) | Seals Aquatics | 11/08/2025 | TCA PC November SC C B A+ | |
| 93 | Chayton Zhou | 44.24 | 9 | BB Min | A: 42.09 (+2.15s | 4.9%) | Pleasanton Seahawks | 03/07/2026 | SRVA Last Chance Meet B BB+ | |
| 94 | Nicholas Mosendz | 44.26 | 9 | BB Min | A: 42.09 (+2.17s | 4.9%) | Santa Clara Swim Club | 01/16/2026 | 2026 Brian Malick Memorial Z1S Championships | |
| 95 | Gregory Lee | 44.27 | 10 | BB Min | A: 42.09 (+2.18s | 4.9%) | Palo Alto Stanford Aquatics | 01/24/2026 | 2026 Zone 1 North Championships | |
| 96 | Thomas Sedano | 44.28 | 10 | BB Min | A: 42.09 (+2.19s | 4.9%) | Monterey Bay Swim Club | 01/16/2026 | 2026 Brian Malick Memorial Z1S Championships | |
| 97 | Ryan Koh | 44.29 | 10 | BB Min | A: 42.09 (+2.20s | 5.0%) | Quicksilver Swimming | 01/16/2026 | 2026 Brian Malick Memorial Z1S Championships | |
| 98 | John Griswold | 44.33 | 10 | BB Min | A: 42.09 (+2.24s | 5.1%) | Alameda Gators | 03/28/2026 | Albany Armada Aquatics SC C B BB+ | |
| 99 | Christian Hernandez | 44.38 | 10 | BB Min | A: 42.09 (+2.29s | 5.2%) | Walnut Creek Aquabears | 03/07/2026 | SRVA Last Chance Meet B BB+ | |
| 100 | Jason Feng | 44.45 | 10 | BB Min | A: 42.09 (+2.36s | 5.3%) | Boys & Girls Club of SF | 03/22/2025 | PSL SC CBA+ 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.