Obit from Tom Taylor:
David Nelson was a star on national radio in 1949, well before “The Adventures of Ozzie & Harriet” transferred to TV and David and his younger brother Rick became even bigger stars in the early days of the tube. David and his all-American-looking family were regulars on TV from the time the show hit in the Fall of 1952 – but it was those three years of network radio that helped prepare him. “Ozzie & Harriet” lasted on TV until 1966 and made the earnest guitar-strumming Rick Nelson a pop idol. The L.A. Times says that David later went into TV himself as a director of commercials, TV shows and movies. He was also a working actor and appeared in John Waters’ movie “Cry-Baby.” Sad to report that he just died of colon cancer at age 74, the last of the original core cast of “Ozzie & Harriet.”