John "Juke" Logan (September 11, 1946 – August 30, 2013) was an American electric blues harmonica player, musician, singer, pianist and songwriter. He is best known for his harmonica playing on the theme music for television programs (Home Improvement and Roseanne) and films (Crossroads and La Bamba). In addition to playing on many other musicians' work, Logan released four solo albums, and wrote songs for Poco, John Mayall and Gary Primich.