When the coach says that Jason is thinking more about baseball-card collecting than about ball playing, he cuts him from the team. Jason will have to play on the Little League's new expansion team--the reject team--which doesn't even have a coach: school custodian Mack Henry, who might really be the great Buck McHenry, who pitched in the old Negro leagues back when black players were excluded from the majors. Mack Henry says his identity is a secret, but soon everybody knows, and that's when the trouble really begins.

This book was left in the Little Free Library. It was released for the Never Judge A Book by its Cover release challenge. (The boy on the cover is wearing a catcher's mask.)