While working full-time as a messenger for the municipality of Mayagüez, Castro held odd jobs in numerous local orchestras, mostly as a singer and percussionist.
At a road stop in Quebradillas, however, Castro learned about the sudden death of Ramón Ortiz del Rivero (Diplo), Puerto Rico's most popular comedian at the time.
He later played a similar role, "Medio Metro", along Velda González's Azucena in "La Criada Malcriada", first on television, later on film.
He hosted Máxima 940 am radio show "Shorty Castro a las 11", on weekday noons, together with long-time friend and fellow comedian Tito Negrón.
"Pa' los caborrojeños" is an ode to the people of Cabo Rojo, Puerto Rico, written to coincide with his stints as a singer and percussionist in one of the town's local orchestras, that of Roberto Ortiz.
[2] Puerto Rican Public Law 186 (2010) honored Castro by naming a newly constructed shoreline park in Mayagüez, the Parque del Litoral, after him.