Now that the Chicago Cubs have a different owner from the radio station it has an identity with for many years, WGN has dropped its popular Sports Central nightly call-in show in favor of "Cubs 10th Inning." It is no surprise to see WGN step up their commitment to the North Side baseball club. As Tom Ricketts and his family take over ownership of the Cubs, new revenue streams are important. And one possibility would be selling the radio rights to a higher bidder. WGN and the Cubs have a deep relationship, and the Tribune company would not want to lose the city's most popular team.