Moro joined a childhood friend, Litto Nebbia, and three others in forming the pioneer Argentine rock and roll band Los Gatos, in 1966.

The group became known for their all-night performances, and composed most of their own songs, many in the well-known neighborhood café, "La Perla del Once" (facing Plaza Miserere).

One such composition, "La balsa" ("The Raft"), was written at that location by Nebbia and the ill-fated songwriter Tanguito on May 2, 1967, and following its release on the RCA Victor label on July 3, sold over 250,000 copies.

Moro then joined ex-Almendra guitarist Edelmiro Molinari in Color Humano, and in 1976, joined Charly García (keyboard and vocals) in two bands: La Máquina de Hacer Pájaros, and, starting in 1978, Serú Girán, the most popular Argentine rock band of their era.

Following Serú Girán dissolution in 1982, he played professionally with León Gieco and others, exploring African rhythms with bassist 'Beto' Satragni in a 1982 crossover album.