Miles Teller
as Vinny Pazienza

Aaron Eckhart
as Kevin Rooney

Katey Sagal
as Louise Pazienza

Ciarán Hinds
as Angelo Pazienza

Ted Levine
as Lou Duva

Christine Evangelista
as Ashley

Amanda Clayton
as Doreen Pazienza

Daniel Sauli
as Jon

Tina Casciani
as Heather

Gary Galone
as Caesar's Pit Boss

Allie Marshall
as Sport Reporter / Fight Attendee

Liz Carey
as Charity

Julie Ann Dawson
as Ring Girl

Gia Skova
as Duran Ring Girl

Jordan Gelber
as Dan Duva

Jay Leno
as Himself (uncredited)

Stephanie McIntyre
as VIP Supporter

Portland Helmich
as Reporter at Weigh-In

Tanja Melendez Lynch
as Woman at Twin River

Susan Garfield
as Casino Gambler

Sully Erna
as Caesar's Blackjack Dealer

Gene Amoroso
as Anthony

Kimberly Howe
as Doreen's Friend

Dante Palminteri
as NBC Late Night Page

Mark Burzenski
as Event Security

Ashley Tramonte
as Ringside VIP

Keith Jeffrey
as Manny

Tom DeNucci
as Tommy

Dicky Eklund Jr.
as Burchfield's Waiter

David Gere
as Scott Pryor (uncredited)

Arthur Hiou
as Head Judge

Gary Tanguay
as Reporter in Caesar's Tunnel

Noelle Trudeau
as Foxy Lady Stripper

Chad A. Verdi
as Chad (uncredited)

Mario Carneiro
as Event Goer (uncredited)

Mathew Morin
as Color Commentator (uncredited)

Jeff Kamps
as Ringside Gambler

Colleen Kelly
as Sports Reporter (uncredited)

Kent R. Williams
as Contruction Worker (uncredited)