Once a top starting pitching prospect, Miller found his career at a cross-roads when he joined the Red Sox for the 2011 season. He had failed as a starter and desperately was looking for a way to keep his once-promising career alive. Miller continued to attempt to rejuvenate his career as a starting pitcher in 2011, but he had very little success compiling a 5.54 ERA in 17 games — 12 games started.
It was apparent to the Red Sox that Miller had very little hope of becoming a successful big-league starter, so they decided to convert him into a reliever going into the 2012 season. Miller became an entirely different pitcher out of the bullpen, becoming one of the top left-handed relievers in baseball. Miller had successful 2012 and 2013 campaigns with the Red Sox, and was off to another dominant season in 2014 when the Red Sox traded him to the Baltimore Orioles in return for prospect Eduardo Rodriguez.
Miller, who was in the mist of his contract year, continued to dominate in Baltimore for the remainder of the 2014 season. After the season, the Yankees rewarded Miller handsomely for his dominance over the past few seasons, giving him a four-year $36 million dollar contract. Miller continued to thrive, this time as a closer, compiling 36 saves and a 2.04 ERA. I’m sure the Yankees are glad to have him on their side of the rivalry.