Michael's daughter, Michelle Allen, said Michael died Thursday morning from complications of chronic lymphocytic leukemia at Sibley Memorial Hospital.
In a statement, WRC TV in Washington, where Michael had been a sports director, called him a pioneer in sports broadcasting. His show, which began as a late-night local feature, ran from 1980 to 2007. The trendsetting program became the first nationally syndicated sports highlights show in 1984 and was eventually broadcast in 194 markets across the United States and in 10 foreign countries.
Michael worked at WFIL radio in Philadelphia from 1966 to 1974. He served as the station's music director and 6 to 10 p.m. disc jockey.
Michael's family says plans for a memorial service are not yet complete.