George C. Scott

as Gloves Malloy / Spats Baxter

Trish Van Devere

as Betsy McGuire / Isobel Stuart

Red Buttons

as Peanuts / Jinks Murphy

Eli Wallach

as Vince Marlow / Pop

Harry Hamlin

as Joey Popchik ("Dynamite Hands")

Ann Reinking

as Troubles Moran ("Dynamite Hands")

Jocelyn Brando

as Mama Popchik / Mrs. Updike

Michael Kidd

as "Pop" Popchik ("Dynamite Hands")

Kathleen Beller

as Angie Popchik ("Dynamite Hands")

Barry Bostwick

as Johnny Danko / Dick Cummings

Art Carney

as Dr. Blaine / Dr. Bowers

Barbara Harris

as Trixie Lane ("Baxter's Beauties of 1933")

Rebecca York

as Kitty ("Baxter's Beauties of 1933")

George P. Wilbur

as Tony Norton ("Dynamite Hands")

Clay Hodges

as Sailor Lawson ("Dynamite Hands")

Charles Lane

as Judge / Mr. Pennington

Peter Stader

as Barney Keegle ("Dynamite Hands")

Jimmy Lennon Sr.

as The Announcer ("Dynamite Hands")

Dick Winslow

as Reporter / Tinkle Johnson

Brendan Dillon

as Jury Foreman ("Dynamite Hands")

John Hudkins

as Hood #1 / Mover #2

Bob Herron

as Hood #2 / Mover #1

Denver Mattson

as Sparring Partner ("Dynamite Hands")

Jimmy Nickerson

as Freddie Fox ("Dynamite Hands")

Harvey Parry

as Referee #1 ("Dynamite Hands")

Wally Rose

as Referee #2 ("Dynamite Hands")

Fred Scheiwiller

as Keegle's Manager ("Dynamite Hands")

James J. Casino

as Keegle's Second ("Dynamite Hands")

John McKee

as Timekeeper ("Dynamite Hands")

Gary Stokes

as Timekeeper ("Dynamite Hands")

Garth Thompson

as Irish Goldberg ("Dynamite Hands")

Clifford Happy

as K.O. Brown ("Dynamite Hands")

Terry L. Nichols

as Kid Gale ("Dynamite Hands")

Larry Hayden

as Fighter #4 ("Dynamite Hands")

Patrick Omeirs

as Fighter #5 ("Dynamite Hands")

Michael Rodgers

as Tiger Barnes ("Dynamite Hands")

Tom Morga

as Killer Wales ("Dynamite Hands")

Clarence Beatty

as Zito Prima ("Dynamite Hands")

Charlie Murray

as Fan #1 ("Dynamite Hands")

Evelyn Moriarty

as Fan #2 ("Dynamite Hands")

June McCall

as Fan #3 ("Dynamite Hands")

Jack Slate

as Fan #4 ("Dynamite Hands")

Michael Lansing

as Fan #5 ("Dynamite Hands")

Chuck Hicks

as Hood #3 ("Dynamite Hands")

George Fisher

as Hood #4 ("Dynamite Hands")

Maidie Norman

as Gussie ("Baxter's Beauties of 1933")

Barney Martin

as Motorcycle Cop ("Baxter's Beauties of 1933")

Sebastian Brook

as Fritz ("Baxter's Beauties of 1933")

Jerry von Hoeltke

as .Theater Workman ("Baxter's Beauties of 1933")

Paula Jones

as Chorus Girl ("Baxter's Beauties of 1933")

John Henry

as Chorus Boy ("Baxter's Beauties of 1933")

George Burns

as Himself (uncredited)

Stanley Donen

as Nightclub Emcee / Cab Driver (uncredited)

Peter Eastman

as Jury Member ("Dynamite Hands") (uncredited)