| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Osvaldo•Mariño Fernández | |
| Used name | Osvaldo•Mariño | |
| Born | 19 July 1923 in Montevideo, Montevideo |  URU |
| Died | 20 September 2007 (aged 84 years 2 months 1 day) | |
| Affiliations | Neptuno — Montevideo, Montevideo | URU |
| NOC | Uruguay | URU |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1948 Summer Olympics | Water Polo (Aquatics) | URU |
Osvaldo Mariño | |||
| Water Polo, Men (Olympic) | Uruguay | =13 |
