| Games |
Sport (Discipline) / Event |
NOC / Team |
Phase |
Unit |
Role |
As |
|
|
1968 Summer Olympics
|
Football (Football) |
 COL |
|
|
|
Guillermo Velázquez |
|
|
Football, Men
(Olympic)
|
|
Match #1 |
Hungary — Japan |
Linesman |
|
|
|
Football, Men
(Olympic)
|
|
Match #4 |
Bulgaria — Israel |
Linesman |
|
|
|
Football, Men
(Olympic)
|
|
Match #2 |
Israel — Ghana |
Linesman |
|
|
|
Football, Men
(Olympic)
|
|
Match #2 |
Bulgaria — Thailand |
Referee |
|
|
|
Football, Men
(Olympic)
|
|
Match #3 |
Bulgaria — Czechoslovakia |
Linesman |
|
|
|
Football, Men
(Olympic)
|
|
Match #4 |
Guatemala — Thailand |
Linesman |
|
|
|
1972 Summer Olympics
|
Football (Football) |
COL |
|
|
|
Guillermo Velázquez |
|
|
Football, Men
(Olympic)
|
|
Match 3/4 |
East Germany — Soviet Union |
Linesman |
|
|
|
Football, Men
(Olympic)
|
|
Match #1 |
Soviet Union — Morocco |
Referee |
|
|
|
Football, Men
(Olympic)
|
|
Match #6 |
West Germany — United States |
Linesman |
|
|
|
Football, Men
(Olympic)
|
|
Match #5 |
Soviet Union — Mexico |
Linesman |
|
|
|
Football, Men
(Olympic)
|
|
Match #1 |
Hungary — Iran |
Referee |
|
|
|
1976 Summer Olympics
|
Football (Football) |
COL |
|
|
|
Guillermo Velázquez |
|
|
Football, Men
(Olympic)
|
|
Match #4 |
Soviet Union — Iran |
Referee |
|
|
|
Football, Men
(Olympic)
|
|
Match #3 |
East Germany — Spain |
Linesman |
|
|
|
1980 Summer Olympics
|
Football (Football) |
COL |
|
|
|
Guillermo Velázquez |
|
|
Football, Men
(Olympic)
|
|
Match 3/4 |
Soviet Union — Yugoslavia |
Linesman |
|
|
|
Football, Men
(Olympic)
|
|
Match #3 |
East Germany — Iraq |
Linesman |
|
|
|
Football, Men
(Olympic)
|
|
Match #3 |
East Germany — Algeria |
Linesman |
|
|
|
Football, Men
(Olympic)
|
|
Match #5 |
East Germany — Syrian Arab Republic |
Referee |
|
|
