On April 13, 1990, YZ released Sons of the Father. In 1987 he released the 12’’ I Am Who I Am / I’m Bad with G-Rock and DJ Tink under the name Too Def. Le 13 avril 1990, YZ sortait Sons of the Father. En 1987 il sort le 12’’ I Am Who I Am / I’m Bad avec G-Rock et DJ Tink sous le nom de Too Def.