 Criollo formed in 2003, and included four members; Salvador "Sol" Valdez, Jose "Chiro" Mata, Alexis "El Gordo" Grullon and Gilbert "Giby" Capellan.These musicians also produced and mixed music videos, engineered their own songs in the studio and albums for other artists, including Sans Pression, and worked with BLESS, SAT, and Guru-Gangstarr.They have also been members of now defunct bands Zona-X, Ultimo Capitulo/Last Chapter, and Black Sunz.