Proving the power of sports on radio, nearly as many people heard a broadcast of the NCAA Men’s Basketball Final Four on broadcast radio as heard the Super Bowl. Dial Global says radio’s Final Four audience was an estimated 20.6 million, nearly as large as the 23.1 million who tuned-in to hear the New York Giants defeat of the New England Patriots. That’s with about 100 fewer stations airing the NCAA games — Dial Global says 512 affiliates carried Final Four programming between March 31 and April 2. The network came up with the audience estimates by commissioning Edison Research to conduct a national telephone survey on Tuesday, the day after the University of Kentucky Wildcats’ victory over the University of Kansas Jayhawks, reports Inside Radio.