How do you rebuild a bullpen? The first order of the day is to quantify the term rebuild. Is this stripping down as you would do with woodwork before repainting or staining? All too often the bullpen gave the appearance of a game show just giving away prizes only it was giving away runs. Just possible that the reaction to the bullpen was ill-advised?
The most notable component of a bullpen is the closer and the Red Sox cut ties with one of the historical best when Craig Kimbrel went elsewhere. With hindsight that was possibly one of the best strategic moves of the Dombrowski administration, but the search for a replacement was tedious.