| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | William Guillermo•Guardia Morales | |
| Used name | Guillermo•Guardia | |
| Born | 27 February 1960 in San José, San José |  CRC |
| Affiliations | Deportivo Saprissa — San Juan de Tibás, San José | CRC |
| NOC | Costa Rica | CRC |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1984 Summer Olympics | Football (Football) | CRC |
Guillermo Guardia | |||
| Football, Men (Olympic) | Costa Rica | =13 |
