A billionaire family of Chicago Cubs fans — including one who first met his wife in the bleachers at Wrigley Field — is set to purchase the team and ballpark from Tribune Co.

The sale would include Wrigley Field and a 25 percent interest in a regional sports network, said Dennis Culloton, a spokesman for group head Tom Ricketts. Culloton said the deal was worth about $900 million.

The selection of Tom Ricketts, a member of the founding family of TD Ameritrade Holding Corp., and chief executive of InCapital LLC, was first reported by the Chicago Sun-Times’ Web site.