USA Boys 10 & under - 50 Y 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 | |
|---|---|---|---|---|---|---|---|---|---|
| 2901 | James Casterton | 42.74 | 9 | BB Min | A: 37.59 (+5.15s | 12.0%) | Mantas Swim Club | 03/15/2025 | 2025 MN FOXJ Short Course 10 U State Champion | |
| 2902 | Marek Barthel | 42.74 | 10 | BB Min | A: 37.59 (+5.15s | 12.0%) | Monticello Swim Club | 01/10/2026 | 2026 MN MONC New Years Invite | |
| 2903 | Ryan Zhang | 42.74 | 9 | BB Min | A: 37.59 (+5.15s | 12.0%) | Tac Titans | 12/19/2025 | 2025 TAC TITANS Jingle Bells Meet | |
| 2904 | Dominic Coyle | 42.74 | 10 | BB Min | A: 37.59 (+5.15s | 12.0%) | Cardinal and Gold Aquatics | 03/13/2026 | 2026 Speedo Maryland Junior Championship Si | |
| 2905 | Alexander Evans | 42.75 | 8 | BB Min | A: 37.59 (+5.16s | 12.1%) | Cardinal and Gold Aquatics | 10/03/2025 | 2025 Aimee McCormick Turrall Memorial Meet | |
| 2906 | Alp Petka | 42.75 | 9 | BB Min | A: 37.59 (+5.16s | 12.1%) | Madison Swimming Association | 04/11/2026 | 2026 Sprint Medal Meet | |
| 2907 | Cooper Proulx | 42.75 | 10 | BB Min | A: 37.59 (+5.16s | 12.1%) | Kent County YMCA | 02/01/2026 | 2026 NE NCYW 36th Annual YMCA Pentathlon | |
| 2908 | Cornelius Celestine | 42.76 | 10 | BB Min | A: 37.59 (+5.17s | 12.1%) | Houston Hydra | 02/21/2025 | 2025 Gulf 12 Under Champs (TASC) | |
| 2909 | Asher Shim | 42.76 | 10 | BB Min | A: 37.59 (+5.17s | 12.1%) | Palo Alto Stanford Aquatics | 11/15/2025 | De Anza Cupertino Aquatics CBA+ Meet | |
| 2910 | Jayden Gohng | 42.76 | 10 | BB Min | A: 37.59 (+5.17s | 12.1%) | Eagle Swim Team Inc. | 03/13/2026 | 2026 Speedo Maryland Junior Championship Si | |
| 2911 | Asa Bains | 42.76 | 10 | BB Min | A: 37.59 (+5.17s | 12.1%) | Csp Tideriders | 03/07/2026 | 2026 GTWY 8 Under Champs | |
| 2912 | Silvio Leal | 42.76 | 10 | BB Min | A: 37.59 (+5.17s | 12.1%) | Maui Swim Club | 02/26/2026 | 2026 HI Hawaiian Swimming SCY AGChamps | |
| 2913 | Samuel Ellsworth | 42.76 | 10 | BB Min | A: 37.59 (+5.17s | 12.1%) | Boise Swim Club | 12/20/2025 | 2025 BY Candy Cane Invitational | |
| 2914 | Henry Guinnup | 42.76 | 9 | BB Min | A: 37.59 (+5.17s | 12.1%) | York Swim Club of Northern Vir | 11/21/2025 | 2025 Swim Rock | |
| 2915 | Siamak Dalley | 42.77 | 9 | BB Min | A: 37.59 (+5.18s | 12.1%) | DC Dept Of Parks and Recreatio | 02/01/2026 | 2026 Little Blue Penguin Pentathlon | |
| 2916 | Santiago Pena | 42.77 | 10 | BB Min | A: 37.59 (+5.18s | 12.1%) | Harlingen Cisd Seal Team | 01/10/2026 | 2026 ST AHAC B Champs South Copied | |
| 2917 | Dominic Pescarino | 42.77 | 10 | BB Min | A: 37.59 (+5.18s | 12.1%) | Birmingham \\\\\\'y\\\\\\' Blue Dolphins | 12/06/2025 | SLA Holiday Blast | |
| 2918 | Jacob Simons | 42.77 | 9 | BB Min | A: 37.59 (+5.18s | 12.1%) | Merritt Athletic Swimming | 12/04/2025 | 2025 Sport Fair Winter Classic | |
| 2919 | Arthur Newfield | 42.77 | 9 | BB Min | A: 37.59 (+5.18s | 12.1%) | Sea Bees Swim Club | 03/07/2026 | 2026 Lake Superior Regional Meet | |
| 2920 | Jaxon Cruz | 42.77 | 10 | B: 38.49 (+4.28s | 10.0%) | YMCA Fairfax County Reston | 01/10/2026 | 2026 MAKO POLAR PLUNGE | ||
| 2921 | Wes Tang | 42.77 | 10 | BB Min | A: 37.59 (+5.18s | 12.1%) | Harbor Seals | 03/27/2026 | 2026 MR Bronze Championships Central KBM | |
| 2922 | Finn Swarts | 42.78 | 8 | BB Min | A: 37.59 (+5.19s | 12.1%) | North Jeffco Swim Team | 03/13/2026 | Mile High Championship Invitational | |
| 2923 | Andre Bryan | 42.78 | 10 | BB Min | A: 37.59 (+5.19s | 12.1%) | Rockville Montgomery Swim Club | 03/20/2026 | 2026 RMSC Spring Finale | |
| 2924 | Leo Reyes | 42.78 | 9 | BB Min | A: 37.59 (+5.19s | 12.1%) | Occoquan Swimming | 12/11/2025 | 2025 East Coast WinterFest | |
| 2925 | Carter Kolakowski | 42.79 | 10 | BB Min | A: 37.59 (+5.20s | 12.2%) | Naval Academy Aquatic Club | 01/17/2026 | 2026 Duck Bowl | |
| 2926 | Nathaniel Hernandez Gomez | 42.79 | 10 | BB Min | A: 37.59 (+5.20s | 12.2%) | Central Coast Swim Club | 02/08/2026 | 2026 AAA SC Final Countdown Open | |
| 2927 | Caleb Lee | 42.79 | 10 | BB Min | A: 37.59 (+5.20s | 12.2%) | Columbia Aquatics Association | 11/14/2025 | GBSA 2025 Thanksgiving Swim Fest | |
| 2928 | Killian Mann | 42.79 | 9 | BB Min | A: 37.59 (+5.20s | 12.2%) | Olympic Cascade Aquatics | 03/28/2026 | 2026 PN Spring Showdown, Div1 Approved | |
| 2929 | Lance Coyne | 42.79 | 9 | BB Min | A: 37.59 (+5.20s | 12.2%) | Mission Aurora Colorado Swimmi | 02/13/2026 | 2026 CO Loveland Last Chance Sweetheart Meet | |
| 2930 | Braydon Li | 42.80 | 9 | BB Min | A: 37.59 (+5.21s | 12.2%) | Buckeye Swim Club | 03/12/2026 | 2026 OH SC Junior Championships | |
| 2931 | Ross Davis | 42.80 | 8 | BB Min | A: 37.59 (+5.21s | 12.2%) | Fast Falcons | 02/28/2026 | 2026 Area 4 Spring Champs | |
| 2932 | Ben Naftel | 42.80 | 9 | BB Min | A: 37.59 (+5.21s | 12.2%) | Ensworth Aquatics | 01/16/2026 | 2026 TYR Mardi Gras Invite | |
| 2933 | Landon Noble | 42.80 | 9 | BB Min | A: 37.59 (+5.21s | 12.2%) | Highlands Ranch Aquatics | 03/13/2026 | Mile High Championship Invitational | |
| 2934 | Damon Shao | 42.80 | 9 | BB Min | A: 37.59 (+5.21s | 12.2%) | Alto Swim Club | 03/28/2026 | Alto Rock The Blocks Invitational 2026 | |
| 2935 | Luke Bess | 42.80 | 9 | BB Min | A: 37.59 (+5.21s | 12.2%) | Rockville Montgomery Swim Club | 02/20/2026 | 2026 RMSC February Invitational | |
| 2936 | Luke Halbrooks | 42.80 | 10 | BB Min | A: 37.59 (+5.21s | 12.2%) | Madison Swimming Association | 04/11/2026 | 2026 Sprint Medal Meet | |
| 2937 | Adrian Wachs | 42.81 | 10 | BB Min | A: 37.59 (+5.22s | 12.2%) | T2 Aquatics | 02/27/2026 | 2026 T2 Area 5 Championships | |
| 2938 | Alex Chen | 42.82 | 9 | BB Min | A: 37.59 (+5.23s | 12.2%) | Seattle Metropolitan Aquatic C | 11/22/2025 | 2025 PN Nov AGI, Division 2 (SMAC) | |
| 2939 | Jay Guzman | 42.82 | 10 | BB Min | A: 37.59 (+5.23s | 12.2%) | AC Swim Club | 12/06/2025 | Neptune Swimming Swim Like The Dickens | |
| 2940 | Jake Hollandsworth | 42.82 | 9 | BB Min | A: 37.59 (+5.23s | 12.2%) | Arlington Aquatic Club | 01/17/2026 | 2026 PV January Open Audrey Moore | |
| 2941 | Wiley Ammons | 42.82 | 9 | BB Min | A: 37.59 (+5.23s | 12.2%) | Smoky Mountain Aquatic Club | 03/20/2026 | 2026 STAR Tar Heel States | |
| 2942 | Maxwell Schleusner | 42.82 | 10 | BB Min | A: 37.59 (+5.23s | 12.2%) | Watertown Area Swim Club | 02/21/2025 | 2025 12 U Short Course State A Championship | |
| 2943 | Taimin McGowan | 42.82 | 10 | BB Min | A: 37.59 (+5.23s | 12.2%) | Spring Swim Team | 02/21/2025 | 2025 Gulf 12 Under Champs (PACK) | |
| 2944 | Oliver Loening | 42.82 | 10 | BB Min | A: 37.59 (+5.23s | 12.2%) | Daly City Dolphins | 03/28/2026 | PSL March CBA+ | |
| 2945 | Charles Knigge | 42.83 | 10 | BB Min | A: 37.59 (+5.24s | 12.2%) | Spokane Waves Aquatic Team | 10/26/2025 | 2025 IE VAN Trick Or Treat Progressive Invita | |
| 2946 | Heath Pena | 42.83 | 9 | BB Min | A: 37.59 (+5.24s | 12.2%) | San Antonio Wave | 12/12/2025 | 2025 ST AAAA NS Winter Wonderland | |
| 2947 | Trevor Lipscomb | 42.83 | 10 | BB Min | A: 37.59 (+5.24s | 12.2%) | Corvallis Aquatic Team | 03/14/2026 | 2026 CAT Spring Invite | |
| 2948 | Roman Mazeres | 42.83 | 10 | BB Min | A: 37.59 (+5.24s | 12.2%) | Richmond City Riptides | 11/22/2025 | NOVA Cranberry Contender | |
| 2949 | Escher Davis | 42.83 | 9 | BB Min | A: 37.59 (+5.24s | 12.2%) | Mecklenburg Swim Association | 03/07/2026 | 2026 MSA March Madness Invitational | |
| 2950 | Armani Bonds | 42.83 | 10 | BB Min | A: 37.59 (+5.24s | 12.2%) | Rockville Montgomery Swim Club | 03/20/2026 | 2026 RMSC Spring Finale | |
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.