President of baseball operations Theo Epstein trades for lefty Mike Montgomery .
President of baseball operations Theo Epstein looks back on how Andrew Miller reinvented himself with the Boston Red Sox , transforming into an All - Star reliever for the New York Yankees .
President of baseball operations Theo Epstein trades for lefty Mike Montgomery and looks back on how Andrew Miller reinvented himself with the Boston Red Sox , transforming into an All - Star reliever for the New York Yankees .