"El Metzo", as he was known to fans, was best known for his work at WHAS (AM) radio, which began in 1946. His call-in show, "Metz Here", which began its run on July 20, 1959 (with the title "Juniper-5-2385"), and ended on June 10, 1993. Though records aren't clear on the subject — Larry King began his first local show a year before, but it isn't clear if he took calls on the air — "Metz Here" is believed to be one of the first call-in shows on radio, pioneering a format that is in widespread use today as talk radio. Metz usually featured guests, and was always kind (almost to a fault) to both guests and callers. Thanks to the station's 50,000-watt clear channel AM signal, "Metz Here" was heard by listeners in 40 states and much of Canada.