After coming through at
Coca-Cola, for whom he made his debut in 1987 while in the
Salvadoran second division, Osorio started his top level career with
FAS and made his debut in August 1990 against
Fuerte San Francisco. He won 6 league titles with FAS in two periods divided by a spell at
Luis Ángel Firpo with whom he also won the league in 1998. He was a long time captain of FAS and after leaving FAS in the summer of 2005, he also played professionally for
Isidro Metapán and
Chalatenango of the
Primera División de Fútbol de El Salvador. ==International career==