The 2012 Brewers bullpen had the worst earned-run average (ERA) in baseball: 4.66. The 2013 Brewers bullpen had the fifth-best ERA in baseball: 3.19. Because this dramatic improvement in ERA coincided with an overhaul of the bullpen, it's tempting to chalk it up to great personnel moves by Doug Melvin, the Brewers General Manager. More than a few writers already have...
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