There are lot of potential pieces to fill out the bullpen moving forward. However that is nothing compared to the strides made so far this offseason. The Milwaukee Brewers have reached deals with many arms on minor league deals.
Most recently, it is the addition of Ernesto Frieri. Him along with several others pose as answers for the 2018 season if they can perform. If they cannot, they will be pitching in the minors for the year, and most likely will not return for the following season.
At the MLB level, the Milwaukee Brewers will hope to find more consistency from players like Jacob Barnes.