The New York Mets are an excellent baseball team with one small blemish. In late-game scenarios, these Mets don’t have a shutdown left-handed reliever they can lean on. Offseason signee A.J. Minter went on the season-ending injured list at the end of April, and their only current lefty in the bullpen is José Castillo, who came from the Arizona Diamondbacks’ scrap heap. There are always a handful of lefties available at the trade deadline, but in a year where they expect to make another deep postseason run, the Mets might as well swing big.