Two Hot Dogs With Everything by Paul Haven
I love this book. It is great for kids who play the game and kids who are just fans. It combines a love of baseball, an obsession with baseball superstitions and a who dun it into a page turner.
Strike Three, You're Dead by Josh Berk
Lenny knows baseball, so when he gets the chance to be an announcer at a major league game, he is over the moon, that is until the pitcher dies on the mound! Nothing seems right and Lenny and his friends start an investigation of their own to figure out what happened.