Marquee Sports Network got off to a fast start by agreeing to carriage deals with AT&T, Mediacom, and Charter Communications this offseason, but that still leaves roughly 60% of the desired market uncovered. The biggest remaining player is Comcast, the media giant with which the Cubs and Sinclair Broadcasting appear to be engaged in a billion-dollar game of chicken. Sources have told Cubs Insider that an agreement is a “foregone conclusion,” but we now sit less than two weeks from Cubs Convention with nary a peep from either side.