Méndez came from a family of footballers, his younger brother and some first cousins were also professional soccer players for CD Luis Angel Firpo and Alianza FC. Nicknamed (El Tabudo) because of the town where he was born, Méndez played for
Atlético Marte, C.D. Suchitepequez (Guatemala) and
C.D.Águila where he was one of the top scorers during his years in the team. Méndez was a very good friend of Brazilian defender
Zózimo Alves Calazães, both met while playing for CD Aguila. Calazães said during an interview in 1968 for La Prensa Grafica, he'd never seen a midfielder-striker with the qualities of Méndez. "The speed, the aerial skills and his style of playing were incomparable, and those qualities made Méndez a very dangerous striker". He also predicted El Salvador was going to qualify for the FIFA 1970 Mexico World Cup. Ironically, Calazães also died in an automobile accident in 1977. ==National team career==