Ed Asner as Hank Cooper

Don Knotts as Coach Venner

Gary Grimes as Andy Petrovic

Tim Conway as Crankcase

Louise Williams as Debbie Kovac

Dick Van Patten as Cal Wilson

Ronnie Schell as Joe Barnsdale

Bob Crane as Pepper

Johnny Unitas as Himself

Dick Butkus as Rob Cargil

Harold Gould as Charles Gwynn

Tom Bosley as Spinner

Virginia O'Brien as Reporter

Kenneth Tobey as Asst. Warden

Richard Kiel as Tall Man

Dick Enberg as Atoms' Announcer

Fred Dryer as Atoms player (sideline & showers) (uncredited)

Liam Dunn as Dr. Morgan

Warde Donovan as Butcher

Larry Burrell as Locker Room Announcer

Titos Vandis as Seth Petrovic

Hanna Landy as Molly Petrovic

Irwin Charone as Hotel Clerk

Timothy Brown as Calvin Barnes

Jackson Bostwick as Stjepan Petrovic

John Orchard as Pemberton Captain

Larry McCormick as N.Y. Broadcaster

Jack Manning as Mayor

Jeanne Bates as Nurse