The Cardinals and Dodgers were in serious negotiations Saturday on a trade that would send shortstop Rafael Furcal and cash to St. Louis, according to a source. St. Louis has been looking to upgrade at shortstop for some time and Los Angeles has been listening to offers to move either Furcal or Jamey Carroll to give infield prospect Dee Gordon an opportunity to play. Furcal, who is a 10-year veteran that has spent more than five years with the Dodgers, has to approve the trade before the deal becomes final.