John Records Landecker (born March 28, 1947) is a Rock and Roll Hall of Fame, Top 40, and Oldies disc jockey.
Landecker began his radio career on a high school station in Ann Arbor, Michigan. He attended Michigan State University, working at stations in Lansing and Philadelphia (WIBG) before becoming the evening jock on the 50,000 watt WLS 890 which broadcasted from Chicago, Illinois in 1972 . The powerful WLS clear channel signal reached across 38 states after sundown, giving Landecker ratings that are unheard of in this day. In 1981 Landecker left Chicago for a stint on CFTR 680 in Toronto, Ontario. Landecker returned to Chicago radio in 1984 on rocker WLUP 97.9 and then G-106 WAGO 105.9. Landecker returned to WLS in 1985 and remained there until WLS switched to an all-talk format in 1989.