Born in 1969 in the Colombian town of Villaviciencio (Meta province), Óscar Julian Ruiz Acosta grew up a son of a referee.
He is a CONMEBOL Elite category referee. Ruiz retired in 2011.
Copas
This single lawyer, who's brother also referees, made his debut in 1992, a match between Millionarios and Indepediente Santa Fe. Only three years later he was asked to lead an international game and since then he is a frequent referee in the Copa Americana and other copas as well as in the Confederations Cup and even at the World Cup.
palmares
Take a look at his palmares, the matches we have found officiated by Ruiz, and you'll see he has been at the top for a very long time, since 1995. In fact Ruiz is category on his own. No one has done as many (Important) matches as him. Still, the reports we got on him are not always positive. Take a look at his matches page
world cups
3 matches in 2002, 1 in 2006 and 2 in 2010.