While he wasn't a prolific actor, he did appear in a few notable projects:
Movies:
* The Last American Hero (1973) - a small role as a gas station attendant.
* Lenny (1974) - a biographical film about Lenny Bruce, in which Baker played the role of a young Lenny Bruce.
Television:
* Saturday Night Live (1975-1976) - Baker was a cast member for one season, known for his stand-up segments and sketches.
* The Tonight Show Starring Johnny Carson - Baker appeared as a guest several times.
* The David Letterman Show - Baker was a guest on the first season of Letterman's show.
Other:
* He also wrote for the television show Laugh-In.
It's important to note that Lenny Baker's career was largely centered around stand-up comedy, and his acting roles were limited. His comedic impact was significant, and he is remembered for his unique and often controversial style.