Mike appeared on Sesame Street, beginning in season 20 as a teenage friend of Gina's (a romantic relationship between the two was often implied). He became a regular cast member the following season, where he worked part-time at the Fix-It Shop. Mike also appeared in the video Dance Along! In Episode 2741, it was established that he is a year younger and a grade behind Gina (who was a high school senior at the time).
Mike was one of Gordon's students. In a 1991 episode, when Telly Monster follows Gordon to school, he watches Gordon teaching a high school science class about volcanos. Mike seems eternally hungry -- Gordon chides him for eating in class, telling him to save his sandwich for lunch; Mike replies that he brought another sandwich for lunch. Later, he says that the volcano film made him hungry, because the fire reminded him of a barbecue.