Mets’ Carlos Mendoza explains ‘concern’ after Sunday’s 7-1 loss at Phillies  SNYSending Alvarez to Triple-A ‘not an easy decision’ for Mets  MLB.comMets Option Francisco Alvarez  MLB Trade RumorsMets demote Francisco Alvarez to Triple-A as young catcher continues to struggle  CBS SportsMets option Francisco Alvarez: What went into the decision and what’s next  The New York Times