Ross Greenburg, who in July departed as president of HBO Sports, has been tapped to produce documentaries for the newly formed NBC Sports Group, which includes the NBC Sports Network, Golf Channel and NBC. He also will produce Costas Tonight, the new monthly interview show that will debut in spring 2012 on the NBC Sports Network — the new name of Comcast’s rebranded Versus channel that launches January 2. That’s also the airdate of Greenburg’s first documentary, Cold War On Ice: Summit Series ’72, which looks at a hockey series between Canadian All-Stars and the Soviet Union during the Cold War in 1972. Greenburg founded Ross Greenburg Productions after ending his 33-year career at HBO, the last of 11 of which were spent as president of the sports division. He previously worked with Costas on the premium network on the sports broadcaster’s On the Record and CostasNOW. “Ross is a master storyteller and a perfect fit to produce high-quality, relevant programming for all of our platforms, particularly NBC Sports Network and Golf Channel,” said NBC Sports Group chairman Mark Lazarus. “His award-winning collaborative relationship with Bob made the decision to retain Ross to oversee production of Costas Tonight a natural.”