Alan Alda as George Plimpton

Lauren Hutton as Kate

Joe Schmidt as Joe Schmidt

Alex Karras as Alex Karras

Sugar Ray Robinson as Sugar Ray Robinson

Vince Lombardi as Vince Lombardi

Frank Gifford as Frank Gifford

David Doyle as Oscar

Ann Turkel as Susan

John Gordy as John Gordy

Mike Lucci as Mike Lucci

Pat Studstill as Pat Studstill

Bill McPeak as Bill McPeak

Jim Martin as Jim Martin

Jim David as Jim David

Chuck Knox as Chuck Knox

John North as John North

Carl Brettschneider as Carl Brettschneider

Roger Brown as Roger Brown

Lem Barney as Lem Barney

Lou Garney as Lou Garney

Mike Weger as Mike Weger

Karl Sweetan as Karl Sweetan

Ron Kramer as Ron Kramer

Charles Bradshaw as Charles Bradshaw

Tom Vaughn as Tom Vaughn

Bill Malinchak as Bill Malinchak

Roger Shoals as Roger Shoals

Jerry Rush as Jerry Rush

Friday Macklam as Friday Macklam

Kent Falb as Kent Falb

Richard Lane as Richard Lane

Richard Thompson as Richard Thompson

Ernest R. Clark as Ernest R. Clark

Mel Farr as Mel Farr

Nick Eddy as Nick Eddy

John McCambridge as John McCambridge

Bill Cottrell as Bill Cottrell

Denis Moore as Denis Moore

Darris McCord as Darris McCord

Jerry Zawadzkas as Jerry Zawadzka

John Henderson as John Henderson

Milt Plum as Milt Plum

Tom Watkins as Tom Watkins

Amos Marsh as Amos Marsh

Mickey Walker as Mickey Walker

Rip Collins as Rip Collins

Chuck Walton as Chuck Walton

Garo Yepremian as Garo Yepremian

Wayne Rasmussen as Wayne Rasmussen

Bruce Maher as Bruce Maher

David Kopay as David Kopay

Ron Goovert as Ron Goovert

Jim Gibbons as Jim Gibbons

Ed Flanagan as Ed Flanagan

Larry Hand as Larry Hand

Frank Gallagher as Frank Gallagher

Bob Kowalkowski as Bob Kowalkowski

Paul Naumoff as Paul Naumoff

Randy Winkler as Randy Winkler

John Robinson as John Robinson

Fred J. Scollay as Man

Mike Bersell as Boy (uncredited)

Ernie Harwell as Baseball Announcer (voice) (uncredited)

Roy Scheider as Man (uncredited)

Edward Winter as Touch Football Player (uncredited)