Gus
The California Atoms are in last place with no hope of moving up. But by switching the mule from team mascot to team member, (He can kick 100 yard field goals!) they start winning, and move up in the rankings, Hurrah! The competition isn't so happy.
Ed Asner
Hank Cooper
Don Knotts
Coach Venner
Gary Grimes
Andy Petrovic
Tim Conway
Crankcase
Louise Williams
Debbie Kovac
Dick Van Patten
Cal Wilson
Ronnie Schell
Joe Barnsdale
Bob Crane
Pepper
Johnny Unitas
Himself
Dick Butkus
Rob Cargil
Harold Gould
Charles Gwynn
Tom Bosley
Spinner
Virginia O'Brien
Reporter
Kenneth Tobey
Asst. Warden
Richard Kiel
Tall Man
Dick Enberg
Atoms' Announcer
Fred Dryer
Atoms player (sideline & showers) (uncredited)
Liam Dunn
Dr. Morgan
Warde Donovan
Butcher
Larry Burrell
Locker Room Announcer
Titos Vandis
Seth Petrovic
Hanna Landy
Molly Petrovic
Irwin Charone
Hotel Clerk
Timothy Brown
Calvin Barnes
Jackson Bostwick
Stjepan Petrovic
John Orchard
Pemberton Captain
Larry McCormick
N.Y. Broadcaster
Jack Manning
Mayor
Jeanne Bates
Nurse