Thomas Ian Nicholas (Henry Rowengartner)
Gary Busey (Chet Steadman)
Albert Hall (Martinella)
Amy Morton (Mary Rowengartner)
Dan Hedaya (Larry "Fish" Fisher)
Bruce Altman (Jack Bradfield)
Tyler Ann Carroll (Edith)
Sam Sanders (Fern Cubs Short Stop)
Patrick LaBrecque (George)
W. Earl Brown (Frick Bullpen Cathcher)
Neil Flynn (Okie Cubs' 1st Base)
Robert Harper (Confused Teacher)
James Andelin (Wizard of Wrigley)
Rom Milanovich (Heddo)
Mike Bacarella (Bleacher Bum)
Andrew Mark Berman (Ernie)
Tom Brennan (Umpire)
John Candy (Announcer (uncredited))
Dan Conway (Press Conference Reporter)
Ken Earl (Pepsi Executive)
James "Ike" Eichling (Little League Coach)
John Gegenhuber (Derkin)
Robert Hy Gorman (Clark)
Christopher Howe (Airport Reporter)
Eddie Bracken (Bob Carson)
Daniel Stern (Phil Brickman)