| Roles | Non-starter |
|---|---|
| Sex | Male |
| Full name | J.•Kroc |
| Used name | J.•Kroc |
| Affiliations | PTE, Bratislava (SVK) |
| NOC |  Czechoslovakia |
| Nationality |  Czechia |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | Nationality | As | |
|---|---|---|---|---|---|---|---|
| 1928 Summer Olympics | Water Polo (Aquatics) | TCH |
CZE |
J. Kroc | |||
| Water Polo, Men (Olympic) | Czechoslovakia |
