It also has evolved into a hybrid between a mechanical book and a strategic one. In college and in the minors, when Harvey faced a batter he expected to see again, he made note of how he approached each hitter and how he fared. Now, as he faces each big-league team for the first time, he will make an entry for every hitter for future reference.
The book’s details are known only to Harvey, who won’t allow anyone else to read it. “It’s got a privacy lock on it,” Harvey said. “It’s for my eyes only.”
Excellent read from the Brian Costa in the Wall Street Journal detailing Matt Harvey and his pitching bible.