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HBO Sports is famous for its series Sports of the 20th Century a series of sports documentaries produced by Greenburg, as well as the leading sports magazine show Real Sports with Bryant Gumbel, a football studio show led by Bob Costas, Dan Marino, Cris Carter, and Cris Collinsworth titled Inside the NFL and HBO World Championship Boxing.
Now he can be seen announcing for Golden Boy Promotions "Solo Boxeo-Tecate" on Telefutura as well as HBO World Championship Boxing and ShoBox.