| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | John Joseph•McCosker | |
| Used name | John•McCosker | |
| Born | 10 October 1910 in Philadelphia, Pennsylvania |  USA |
| Died | 7 August 1965 (aged 54 years 9 months 28 days) in Springfield, Delaware, Pennsylvania | USA |
| Affiliations | Penn AC — Philadelphia, Pennsylvania | USA |
| NOC | United States | USA |
John McCosker sat in the stern of the US four without at the 1932 Los Angeles Olympics. He represented the Penn Athletic Club. McCosker was a 1927 graduate of LaSalle University, and was a veteran of World War II. He later became an engineer with the Pennsylvania Railroad.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1932 Summer Olympics | Rowing | USA |
John McCosker | |||
| Coxless Fours, Men (Olympic) | United States | 4 |
