 On one engagement with López in Coamo, Puerto Rico, Santiago met Roberto Angleró and offered his services as a backup singer if he ever needed one.Soon after that meeting, Angleró needed a background singer and called López to see if he could lend Santiago to do some background vocals for his group and López told Angleró "you can keep him if you want to".Santiago joined Angleró's group and in 1970 recorded an album with them.