Bob CostasA 26-time Emmy Award-winning journalist, Bob Costas is one of the most respected and honored broadcasters of his generation. He will serve as primetime host during the 2016 Rio Olympics, which will be his 12th Olympic assignment for NBC Sports, and hs 11th as primetime host, the most of any broadcaster in U.S. television history. He joined NBC in 1980 and has the longest tenure among the network's sports announcers. He has worked with Rowdy Gaines at more than a half dozen Olympics. Read More Read Less