| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Guillermo•Cosio Sánchez | |
| Used name | Guillermo•Cosio | |
| Born | 15 September 1958 in Ciudad de México (Mexico City), Ciudad de México |  MEX |
| Measurements | 179 cm / 73 kg | |
| Affiliations | Cruz Azul — Ciudad de México (Mexico City), Ciudad de México | MEX |
| NOC | Mexico | MEX |
Guillermo Cosio was a member of the gold medal winning team at the 1975 Pan American Games.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1976 Summer Olympics | Football (Football) | MEX |
Guillermo Cosio | |||
| Football, Men (Olympic) | Mexico | =9 |
