The film details the life of Ray Mancini, a World Boxing Association world lightweight champion boxer from 1982 to 1984, Hollywood actor and a member of the International Boxing Hall of Fame.
Robert Blake
as Lenny Mancini
Doug McKeon
as Ray 'Boom Boom' Mancini
Mariclare Costello
as Ellen Mancini
Tony Burton
as Grif
James T. Callahan
as Father O'Neill
Norman Alden
as Ray Arcel
Ray Buktenica
as Dave Wolf
Richard Bakalyan
as Frank Jacobs
Curtis Conaway
as Lenny Jr.
Luisa Leschin
as Ellen Jr.
Ben Frank
as Eddie Sullivan
Carl Steven
as Ray - age 10
