Calificación
Reparto

Peter Dale
Narrator

Jack Dempsey
Himself (Archival Footage)

Joe Louis
Himself (Archival Footage)

Rocky Marciano
Himself (Archival Footage)

Muhammad Ali
Himself (Archival Footage)

George Foreman
Himself (Archival Footage)

Mike Tyson
Himself (Archival Footage)