Liev Schreiber
Chuck Wepner
Naomi Watts
Linda Wepner
Elisabeth Moss
Phyllis Wepner
Ron Perlman
Al Braverman
Jim Gaffigan
John Stoehr
Michael Rapaport
John Wepner
Pooch Hall
Muhammad Ali
Morgan Spector
Sylvester Stallone
Jason Jones
Arty
William Hill
Paddy
Wass Stevens
Johnny Dicesare
Kelvin Hale
Charlie Polite
Megan Sikora
Flo Wepner
Emil Tonev
Fight Ref
Georgia X. Lifsher
Rachel
Catherine Corcoran
Sandy
Sadie Sink
Kimberly
Melo Ludwig
Young Kimberly (aged 6)
Georgi Georgiev
Mouthy
Mihail Nedyalkov
Nerk
Liv Rooth
Platinum Blonde
Joe Starr
Manny
Leslie Lyles
Charlotte
Velizar Binev
Referee
Robert C. Kirk
Warden
J.J. Kandel
Jimmy the Cop
Jen Ponton
Stallone's PA
Rick Zahn
Police Captain
Ivan Martin
Bobby Vann
Jonathan Wilde
Dave
Zina Wilde
Teacher
Charlie Meany
Sports Interviewer
Mark Borkowski
Joe
Lucinda Rogers
Lil
Anthony J. Gallo
Maitre'D
Shade Rupe
16mm Cameraman (uncredited)
Leonard Zimmerman
Hotel Valet (uncredited)
Genko Ivanov
Terry Hinke
Paul Mecurio
Goomba Partier