John Kostecki
| Country | United States |
| Sail number | |
| Sailing club | n/a |
| Championships |
 |
| Nick name | |
| Boatname | |
| Link(s) |
Worlds results
| 1982 | San Mateo, CA (USA) - Coyote Point Yacht Club | 1 |
Worlds Results
Detailed Worlds race results
Other results
| Melges 20 | Worlds Scarlino (ITA) | 1 |
| Farr 40 | Worlds (USA) | 1 |
| RC 44 | Worlds (USA) | 1 |
| 12 Metre | America's Cup (USA) | 1 |
| VOR | Volvo Ocean Race (USA) | 1 |
| Mumm 36 | Worlds (USA) | 1 |
| 6 Metre | Worlds (- ) | 1 |
| J24 | Nationals (- ) | 1 |
| Soling | Worlds (- ) | 1 |
| Sunfish | Championship of Champions Rush Creek YC (USA) | 1 |
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Sailed with
| Chapin, Dave (USA) | 2 |
| Fries, Derrick (USA) | 2 |
| Moore, Ted (USA) | 1 |
| Schneider, Jurgen (CUW) | 1 |
| Dennert, Marcel (CUW) | 1 |
| Kervel, Ernie (ABW) | 1 |
| Christiaan, Andre (ABW) | 1 |
| Roose, Alex (CUW) | 1 |
| Blouin, Joe (USA) | 1 |
| Cappelletti, Guillermo (PER) | 1 |
| Martinborough, Donald (BHS) | 1 |
| Zimmermann, Alex (PER) | 1 |
| Beckwith, Alan (USA) | 1 |
| Stewart, James (BMU) | 1 |
| Dane-Weatherly, Leslie (USA) | 1 |
| Fisher, Paul (BMU) | 1 |
| Lee, Howard (BMU) | 1 |
| Frith, David (BMU) | 1 |
| Catalano, Michael (USA) | 1 |
| Willy, Jack (USA) | 1 |
| Gay, Todd (USA) | 1 |
| Herndon, Eric (USA) | 1 |
| Aberson, Rob (SXM) | 1 |
| Lowrie, Chris (USA) | 1 |
| May, Mark (USA) | 1 |
| Scharfe, Alan (USA) | 1 |
| Ruby, Len (USA) | 1 |
| Bergman, Jean (USA) | 1 |
| Friend, Chris (USA) | 1 |
| Wal, Richard van der (ABW) | 1 |