McEachin played Mr. Turner, a tax collector for the Internal Revenue Service, and later a character named Solomon Jackson, a co-worker that Archie Bunker tries to recruit for his social club, on the television show "All in the Family". He played the deejay Sweet Al Monte in "Play Misty for Me" (1971) with Clint Eastwood. In 1973, he starred as Harry Tenafly, the title character in "Tenafly", a short-lived detective series about a police officer turned private detective who relied on his wits and hard work rather than guns and fistfights. As the star of that show, he is (along with Susan Saint James of "McMillan and Wife") one of the last surviving actors to have starred as a title character from a series featured on the 1970s' NBC Mystery Movie. McEachin also appeared occasionally as Lieutenant Ron Crockett on "Emergency!". In 1978, he played a police officer in "Every Which Way But Loose". In 1979, he played the role of a jaded ex-marine high school baseball coach in an episode ("Out at Home") of "The White Shadow".