Joseph Mazzarino began working with the Muppets in 1989 and has been performing and writing for Sesame Street since 1990.
He performs a number of characters on the show, including Murray, Stinky the Stinkweed, the Two-Headed Monster, Papa Bear, and one very strange Elephant in a tutu. Mazzarino has also directed several Sesame Street episodes.
Mazzarino's writing credits include Sheep in the Big City and Bear in the Big Blue House, as well as a feature-length video of the Disney Channel's Stanley. He has co-written several screenplays, including Muppets in Space and The Adventures of Elmo in Grouchland. Mazzarino wrote and performed on the first-ever Henson direct-to-video feature, Kermit's Swamp Years. In 2010, Mazzarino won an Emmy Award for Outstanding Performer in a Children's Series for his performances of Murray, Stinky and Blogg.