Complex sentence: One day, Benny busts the guts out of their baseball, but Smalls saves the day by borrowing his stepfather's ball; after that ball also ends up with the Beast, Smalls learns the ball was special: it was signed by Babe Ruth.
Split into simpler sentences: One day, Benny busts the guts out of their baseball and Smalls borrows his stepfather's ball. After that ball also ends up with the Beast, Smalls learns the ball was special; it was signed by Babe Ruth.