The New York Mets opted to DFA former Atlanta Braves all-star Craig Kimbrel, which could end his MLB career.Kimbrel has been bouncing around teams over the last couple of years, but after struggling with the Mets, his career might be over. Once Kimbrel does retire, the next question will be whether he will be a Hall of Famer.Kimbrel is one of the best closers of this generation, but MLB insider Bob Nightengale thinks him being DFA’d by the Mets …