Leave it to the Mets to see a player retire — and have him replaced by guy even older. That was the news today when 40-year-old worn-out warrior David Cone 16 called it a career and was replaced on the roster by 42-year-old rehabbed reliever John Franco 45. Good luck to David, who joins Mo Vaughn among pretty good players who seem to have spent their last days of their careers with the ’03 Mets.