[citation needed] Díaz moved to Spain after graduating from school and he worked with a group that was widely successful, La Pandilla, which had 4 boys and 1 girl, Mari Blanca, (now a Veterinarian in her home country), but after the La Pandilla members grew up, he moved back to Puerto Rico, and created Menudo.
[citation needed] Diaz was once romantically linked to the Puerto Rican actress and singer Millie Aviles.
[8] As of May 2nd 2023, Díaz was under investigation by the Los Angeles Police Department over allegations that he sexually assaulted a former teenage member of the group in the 1980s.
[9] Díaz was played by Braulio Castillo Jr. and by Yamil Urena in the 2020 Amazon Prime Video series based on Menudo, "Subete A Mi Moto".
[10] In the sixth episode of Monsters: The Lyle and Erik Menendez Story, Diaz was portrayed by Hugo Medina.