Originally Posted by Babalu
Kaplan was a standup only, and a very successful one. He couldn't act at all and was reluctant to do a sitcom but it was too good of a career move. He was often called the worst actor on TV but the show was a huge hit so no one cared.
I was going to say, "I don't recall him acting while Kotter was on, either," but my rimshot guy is gone for the weekend.