Earl Ball is the weak principal of William Penn Academy who appears to be phobic of Beverly.
Although Earl is in a position of power as the principal of William Penn, he is a timid man who appears to be afraid of Beverly and always is reluctant to answer the door if Beverly is on the other side of it.
It remains unknown how many children Earl has. It is known that he has a wife and at least 1 child. His wife's name has never been mentioned, but it is known that he has a son named Garry who is Adam's age and is friends with Adam. That information was revealed in the episode "I Drank The Mold".