The owners of two rooftop businesses overlooking Wrigley Field are suing the Chicago Cubs and owner Tom Ricketts to try to block plans to erect outfield signs. The federal lawsuit filed Tuesday accuses the Cubs of breaching the terms of the team's revenue-sharing contract with rooftop owners. The rooftop owners are seeking a financial judgment and a ruling barring the Cubs from blocking views into Wrigley from the rooftops. More...