Ran across the book in a thrift store. Knew the story (killed by a foul ball while coaching first base at Dickey-Stephens Park) but wasn't aware of the book. Not quite finished reading it yet, but would recommend it.
https://www.goodreads.com/book/show/6004392-heart-of-the-game
https://en.wikipedia.org/wiki/Mike_Coolbaugh
Sad but interesting story.