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For the Scooby-Doo and Scrappy-Doo (1st series) character also known as Lefty Callahan, see here.

Oliver Callahan was an American animator, having worked primarily for Hanna-Barbera. He also animated on some Charlie Brown specials in the 80s.

Callahan died in 2014, at the age 84.

Crew credits

TV series

TV specials

TV films

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