- Voiced the character of the Bill in "I'm Just A Bill", and of the train engineer in "Conjunction Junction", two notable installments of the cartoon series Schoolhouse Rock! (1973).
- Jazz musician/singer/character actor, probably best known as Merv Griffin's trumpet-playing sidekick on his 1970s TV talk show and as the star of cult TV hit, Run Buddy Run (1966).
- Was a friend of legendary satirist Lenny Bruce.
- Sheldon voiced "Louie the Lightning Bug" in a series of animated musical public service announcements aimed at children during the 1980s, promoting safety with electricity.
- Father of Kevin Sheldon, John Sheldon, Julie Sheldon and Jesse Sheldon.
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