ESPN is expected to announce on Wednesday that the former network mainstay Keith Olbermann, who contentiously departed in 1997, will return to host a one-hour, nightly show for ESPN2 later this year, according to three executives with knowledge of the deal but not authorized to speak about it publicly…

Within ESPN, there was concern about asking Olbermann back because he left the network under emotionally charged circumstances and because it was feared by some that Olbermann had become too politicized as the host of his interim MSNBC program “Countdown,” which aired from 2003 through January 2011.

On his new show, Olbermann will be free to discuss matters other than sports, including pop culture and current events, but not politics, the two-year pact specifies.