Gary Coleman as Jackie Robinson 'J.R.' Cooper

Robert Guillaume as Larry Cooper

Gary Collins as Pete Sloane

Ed McMahon as Fred Walker

Tricia O'Neil as Marion Fowler

Tab Hunter as Bill Lorant

Rick Podell as Leonard Hyams

Alberto Vazquez as Juan Telles

Steve Tannen as Orlando

Ken Medlock as Grosso

Stu Nahan as News Sportscaster

Stanley Brock as Carl Hagen

Weldon Bleiler as Bill the Gateman

Peggy Browne as The Secretary

Jerry Cole as The Padres Sportscaster

Sonny Craver as Mr. Brown

Don Draper as The Process Server

Dick Gjonola as The Disgruntled Fan

Gordon W. Grant as Rydell

Bill Henderson as Brad Linquist

Rance Howard as Harry the Bartender

Angelo Lamonea as Vreeland

Nancy Hahn Leonard as Mrs. Krager

Dion Mail as Bryan

Justin Randi as Herman

Hank Robinson as The Umpire

Owen Sullivan as Bob Holden

Steve Nave as Larson (uncredited)