William Osorio

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 six 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.

Osorio made his debut for El Salvador in an April 1991 UNCAF Nations Cup qualification match against Nicaragua and has earned a total of 67 caps, scoring no goals. Osorio has been a national team stalwart for over 10 years and has represented his country in 18 FIFA World Cup qualification matches over three campaigns and played at the 1991, 1993, 1995, 1997, 1999 and 2001 UNCAF Nations Cups, as well as at the 1996 and 2002 CONCACAF Gold Cups. His final international game was a January 2002 CONCACAF Gold Cup match against the United States.

Osorio was married and had two sons. He died on October 5, 2026, at the age of 55.

As a player

FAS

Primera División de El Salvador (7): 1995, 1996, 1998, 2002 Clausura, 2002 Apertura, 2004 Apertura, 2005 Clausura Luis Angel Firpo

Primera División de El Salvador: 1997–98

As a coach

Zacatecoluca

Tercera Division: Apertura 2023, Clausura 2024