Mr. Blumberg is Mikey's father who appears in "Parents' Night", "Dance Lessons", and "Bonky Fever". He has long blond hair and wears glasses and kinda resembles a hippie. In the episode "Parents' Night", he gets so emotional over his son's poem and is comforted by his wife.
He is married to Mrs. Blumberg.
He also has a silent cameo in Recess: School's Out.