The Cubs have had multiple discussions with Mark Buehrle's agent Jeff Berry, a source tells Jon Paul Morosi of FOX Sports (Twitter link). Berry also met with Marlins earlier today. Morosi sums up the other interested clubs: the White Sox, Blue Jays, Royals, Angels, Nationals, and Diamondbacks.
Earlier in November, we heard that the Cubs would have interest in the longtime White Sox pitcher "if the price tag and years aren't astronomical." Considering the number of Buehrle rumors we've heard so far this offseason, there appears to be plenty of competition, but we don't have a clear idea yet of the years and dollars the lefty might be offered.