When Ball Four was first published in 1970, it hit the sports world like a lightning bolt. Commissioners, executives, and players were shocked. Sportswriters called author Jim Bouton a traitor and social leper. Commissioner Bowie Kuhn tried to force him to declare the book untrue. Fans, however, loved the book. And serious critics called it an important social document. Following his death, Bouton's landmark book has remained popular, and his legacy lives on through its many readers, including those who don't ordinarily follow baseball.

For the updated edition of this historic book, Bouton wrote a new epilogue detailing his perspective on how baseball has changed since the last edition was released.