He is well known for the duet with Sylvia Robinson entitled Soul Je T'aime and for his solo reworking of Make It With You previously recorded by David Gates and Bread.
In 1971, he broke through nationally with a Latin cover of Make It With You which entered the Billboard R&B chart on the 10 July 1971 for an eleven-week run during which it peaked at #32.
A further R&B hit in 1973 with Soul Je T'Aime, a duet with Sylvia Robinson on Vibration records was his last appearance on the national charts.
By 1976 Pagán was based in Los Angeles where he connected with Colombian band leader drummer percussionist Mike Rojas.
In Los Angeles he recorded his last album El Flaco De Oro with Mike Rojas, who features with a timbal solo on the song titled "Cubita Triste".
Ralfi became a regular on the thriving club and salsa dance circuit that included The Gold Dust on Garfield Avenue in Montebello, The King's Table in Pico Rivera, The Monterey West in East Los Angeles and the Mardi Gras across from MacArthur Park.
[8] His family was told that a promoter arranged for his murder to avoid payment of money due with his body being left on a local beach.