One of the most popular children's sports books ever is Casey At the Bat, a baseball poem written in 1888 by Ernest Thayer.
You can read the entire poem at Baseball Almanac.
For those of you who love this classic story, you might also want to check out the monster version, Monster at the Bat that's being released soon with the happy ending baseball fans have always wanted. The monsters play baseball, and the most beloved team hails from Monsterville, where the fans are wild, the games are thrilling, and the bizarre lineup includes some of the most memorable monsters who ever played the game. The championship game is a monsterfest of excitement, suspense and monstrous behavior.
Hardcover: 32 pages
Publisher: Milk & Cookies Press (September 25, 2009)