From Muppet Wiki

The Mudman delivers mud to Oscar the Grouch.

Episode Appearances

• Episode 0297 -- When Oscar puts up "NO" signs all over his trash can, the Mudman sees a "No Salesmen" sign and refuses to sell Oscar his fresh supply of mud.

Book Appearances

• The Sesame Street 1, 2, 3 Storybook (1973)
• The Sesame Street Bedtime Storybook (1978)
• The Sesame Street Dictionary (1980)
• A Day in the Life of Oscar the Grouch (1981)
• Oscar's Rotten Birthday (1981)
• The New Who's Who on Sesame Street (1989)