In October 1960, Art Roberts joined the station as a DJ, having previously worked at WKBW in Buffalo, New York. Clark Weber joined the station as a DJ, remaining with the station until 1969. In 1963, Ron "Ringo" Riley joined the station as a DJ, having previously worked at WHK in Cleveland, Ohio. Dex Card joined the station in 1964, and hosted the Silver Dollar Survey countdown until 1967, the longest of the show's hosts. In 1967, Larry Lujack joined WLS as a DJ, four months after he had started at the station's top competitor WCFL. Lujack returned to WCFL in 1972, but rejoined WLS in 1976, remaining with the station until 1987. In 1972, John Records Landecker joined WLS, remaining with the station until 1981. Landecker returned to WLS in 1986, and remained with the station until its format was changed in 1989. Tommy Edwards joined the station as production director in 1972, becoming program director one year later, and later becoming a mid-day DJ. Bob Sirott joined WLS in June 1973, remaining with the station until December 1979.