Born Mariano Javier Castro, he is an award-winning Argentine reggae singer whose 2012 album Transparent earned the most acclaim of his discography. He performed with a band called Los Guerreros del Rey.
He recorded a debut song called "Mi Amor" in 2004. He officially began his solo career as Dread Mar-I in 2005 after spending years as a vocalist for Mensajeros Reggae.
His song "Inspiration" was the theme song for ESPN's Gravity Zero.
He worked in a bakery his father opened in Maipu, Argentina. He was born in Quequén.
He generated some controversy in the media for comments he made about Gustavo Cerati just 10 days after Cerati's death.