Anthony Quinn

Lewis 'Mountain' Rivera

Acting

Jackie Gleason

Maish Rennick

Acting

Mickey Rooney

Army

Acting

Julie Harris

Grace Miller

Acting

Stanley Adams

Perelli (as Stan Adams)

Acting

Madame Spivy

Ma Greeny

Acting

Val Avery

Young fighter's promoter

Acting

Herbie Faye

Charlie, the Bartender

Acting

Jack Dempsey

Himself

Acting

Muhammad Ali

Himself (as Cassius Clay)

Acting

Lou Gilbert

Dr. Gilbert

Acting

Michael Conrad

Ma Greeny's Thug

Acting

Rory Calhoun

Himself

Acting

Barney Ross

Acting

Willie Pep

Acting

Steve Belloise

Hotel Desk Clerk

Acting

Abe Simon

Acting

Stan Ross

Acting

J.J. Ballargeon

Acting

Paolo Rosi

Acting

Alex Miteff

Acting

Gus Lesnevich

Acting

Al Bain

Police Officer (uncredited)

Acting

William Calhoun

Self - Rivera's wrestling opponent (uncredited)

Acting

Nancy Cushman

Woman on Elevator (uncredited)

Acting

Sig Frohlich

Diner Patron (uncredited)

Acting

John Indrisano

Barfly Watching TV (uncredited)

Acting

Arthur M. Mercante

Referee (uncredited)

Acting

Angelo Rossitto

Midget Wrestler Outside Wrestling Ring (uncredited)

Acting

David Susskind

Self - Trailor Narrator (uncredited)

Production