Zack is a DJ from the Dead or Alive series, who first appeared in the original Dead or Alive. A self-taught Muay Thai boxer, Zack only enters the Dead or Alive Tournaments for money and fame.
While achieving a place in the top three in the previous three tournaments, either due to other contestants withdrawing or through his own efforts, Zack is the "winner" of the fourth tournament, as Helena Douglas gave up her title of winner to him.