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Cleavon Little is an African-American actor, who appeared in Episode 0270 of Sesame Street, as "Pete". He is best known for his role in film Blazing Saddles, and the 1970s sitcom Temperatures Rising.
In 1974, Dolores Robinson separated from her husband, Sesame writer and actor Matt. She and their two kids moved to Malibu, California, where they stayed at Little's house. Dolores knew Cleavon from his "stint" on Sesame Street.[1]
Because of this, some suspect he might have played "Proto Gordon" on the series.