The Instigators

Matt Damon

As Rory

Casey Affleck

As Cobby

Ving Rhames

As Frank Toomey

Jack Harlow

As Scalvo

Michael Stuhlbarg

As Mr. Besegai

Alfred Molina

As Richie Dechico

Owen Earls

As Charlie Haggerty

Hong Chau

As Dr. Donna Rivera

Natalie Carter

As Mrs. Haggerty

Walter Liebman

As Terry

André De Shields

As Mr. Kelly

Ron Perlman

As Mayor Miccelli

Rob Gronkowski

As Rob Gronkowski

Toby Jones

As Attorney Alan Flynn

Slate Holmgren

As Dave Wedge

Ronnie Cho

As Mark Choi

Sheika Murray

As Waiter #1 at Wharf

Perry Strong

As Waiter #2 at Wharf

Nick Trice

As City Hall Employee

Tommy Nohilly

As Police Commissioner

Jason Furlani

As Cabinet Member

David Gborie

As Bouncer

Toby Onwumere

As John Wayne

Paul Walter Hauser

As Booch

Scout Backus

As Colani

Nicholas B Alexander

As Sergeant at Rivera's Office

Nathaniel Wood

As Massachusetts Trooper #1

Craig Hutchinson

As Massachusetts Trooper #2

Mike Bash

As Boston Police Officer

Deirdre McCourt

As Vermont Cop

Shawn Fitzgibbon

As Quincy Cop

Jerry Kernion

As Fire Monitor

Nik Walker

As Hero Fireman

Ramona Floyd

As Bartender

Mark Steven Dancewicz

As Tactical Cop

Brett Keating

As Sniper in Tower

Michael Rodrick

As Police on the Roof

Eleni Yiovas

As Senior Tactical Cop

Gregory Cunningham

As Senior Cop at Plaza

Peter Morse

As Cop at Barricade

Robert Marsella

As Cop That Says Hey

Don DiPetta

As Officer at Airport

Christopher Brian Roach

As Police Transfer Officer

Billy Smith

As New Police Commissioner

John Noble Barrack

As Photographer

Jadon Cole

As Rory's Son

Robbie Dema

As Border Patrol Mountie #1

Robert Harvey

As Border Patrol Mountie #2

Jonathan Gabriel Charles

As Pollster

Craig 'Radio Man' Castaldo

As Self (uncredited)