AM 620 WTMJ (W The Milwaukee Journal) is a News/Talk station in Milwaukee, Wisconsin. They also carry Milwaukee Brewers baseball, Milwaukee Bucks basketball and have broadcast Green Bay Packer games since 1929--the longest relationship between a radio station and NFL team.
Jonathan Green worked as an announcer at WTMJ continuously (almost) from 1969 until 2010.
here. A WTMJ Packers magnet is over here.