| Roles | Non-starter | 
|---|---|
| Sex | Male | 
| Full name | John Charles•Blankenagel | 
| Used name | John•Blankenagel | 
| Born | 22 December 1886 in Germantown, Wisconsin (USA) | 
| Died | 27 November 1969 in Middletown, Connecticut (USA) | 
| Affiliations | University of Wisconsin | 
| NOC |  United States | 
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1908 Summer Olympics | Athletics |  USA | John Blankenagel | |||
| 1,500 metres, Men (Olympic) |