| Games |
Sport (Discipline) / Event |
NOC / Team |
Phase |
Unit |
Role |
As |
|
|
1988 Summer Olympics
|
Hockey |
 ARG |
|
|
|
Eduardo Ruiz |
|
|
Hockey, Men
(Olympic)
|
|
Final Round |
Pakistan — India |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Semi-Finals |
West Germany — Netherlands |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group B |
Soviet Union — India |
Umpire 2 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group B |
West Germany — Great Britain |
Umpire 2 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group B |
Great Britain — Soviet Union |
Umpire 2 |
|
|
|
1992 Summer Olympics
|
Hockey |
ARG |
|
|
|
Eduardo Ruiz |
|
|
Hockey, Men
(Olympic)
|
|
Final Round |
Germany — Australia |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Semi-Finals |
Germany — Pakistan |
Umpire 2 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group B |
Netherlands — Unified Team |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group B |
Pakistan — New Zealand |
Umpire 2 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group B |
Spain — Unified Team |
Umpire 2 |
|
|
|
1996 Summer Olympics
|
Hockey |
ARG |
|
|
|
Eduardo Ruiz |
|
|
Hockey, Men
(Olympic)
|
|
Final Round |
Australia — Germany |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Final Round |
Great Britain — India |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group B |
Netherlands — Malaysia |
Umpire 2 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group B |
Australia — Republic of Korea |
Umpire 2 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group B |
Great Britain — South Africa |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group B |
Republic of Korea — Malaysia |
Umpire 1 |
|
|
|
2000 Summer Olympics
|
Hockey |
ARG |
|
|
|
Eduardo Ruiz |
|
|
Hockey, Men
(Olympic)
|
|
Final Round |
Australia — Pakistan |
Umpire 2 |
|
|
|
Hockey, Men
(Olympic)
|
|
Semi-Finals |
Netherlands — Australia |
Umpire 2 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
Germany — Malaysia |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
Great Britain — Malaysia |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
Germany — Netherlands |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
Canada — Great Britain |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
Canada — Malaysia |
Umpire 2 |
|
|