 Walter MatthauMorris Buttermaker | Morris Buttermaker |
 Tatum O'NealAmanda Whurlitzer | Amanda Whurlitzer |
 Vic MorrowRoy Turner | Roy Turner |
 Joyce Van PattenCleveland | Cleveland |
 Ben PiazzaBob Whitewood | Bob Whitewood |
 Jackie Earle HaleyKelly Leak | Kelly Leak |
 Alfred LutterOgilvie | Ogilvie |
 Chris BarnesTanner Boyle | Tanner Boyle |
 Erin BluntAhmad Abdul Rahim | Ahmad Abdul Rahim |
 Gary Lee CavagnaroEndelberg | Endelberg |
 Jayme EscobedoJose Agilar | Jose Agilar |
 Scott FirestoneRegi Tower | Regi Tower |
| GGeorge GonzalesMiguel Agilar | Miguel Agilar |
 Brett MarxJimmy Feldman | Jimmy Feldman |
 David PollockRudi Stein | Rudi Stein |
 Quinn SmithTimmy Lupus | Timmy Lupus |
 David StambaughToby Whitewood | Toby Whitewood |
 Brandon CruzJoey Turner | Joey Turner |
 Timothy BlakeMrs. Lupus | Mrs. Lupus |
 Bill SorrellsMr. Tower | Mr. Tower |
 Shari SummersMrs. Turner | Mrs. Turner |
 Joe BrooksUmpire | Umpire |
 George WynerWhite Sox Manager | White Sox Manager |
| DDavid LazarusYankee | Yankee |
 Charles MatthauAthletic | Athletic |
| MMaurice MarksAnnouncer (voice) | Announcer (voice) |
| LLesley EvansBallet Teacher (uncredited) | Ballet Teacher (uncredited) |
| HHoward CulverNewscaster (uncredited) | Newscaster (uncredited) |
 Bob HarksSpectator at Ball Game (uncredited) | Spectator at Ball Game (uncredited) |
| RRunning DeerSpectator at Ball Game (uncredited) | Spectator at Ball Game (uncredited) |
