The Red Sox added some bullpen depth to their minor-leagues Tuesday with a high-upside signing. Boston signed embattled ex-New York Mets reliever Jennry Mejia to a minor league deal, according to FanCred’s Jon Heyman and USA Today’s Bob Nightengale. His deal comes with an invite to spring training and is worth $ 625 thousand if he makes the big league club, per Heyman. Mejia isn’t exactly known for the best reasons around baseball, because in Feb. 2016 he was the first player to ever receive a lifetime ban due to failing three performance-enhancing drug tests. He was successful in applying for reinstatement, getting the league’s approval in July ... NESN.com