Oscar's Pop

Oscar's Pop is the father of Oscar the Grouch and Otto the Grouch. Like Otto, Mr. Grouch is never seen in any episodes of Sesame Street. He only mentioned in the 1976 book How to Be a Grouch, along with a few other of Oscar's relatives. He is also mentioned in the Christmas special A Special Sesame Street Christmas. Whether Mr. Grouch has passed away or whether he and Oscar's mother are simply divorced is unknown.