The ZiPS projections are calculated every year by Dan Szymborski, they have recently been published on fangraphs. Projections attempt to use algorithms to predict future performance. As stated many times on these pages, predicting the future is very difficult. No projection system is perfect, but they can serve as a good baseline for performance expectations. For in-depth analysis, I suggest you ready the full article by Carson Cistulli here. Below are the rounded win totals for the Brewers, courtesy of ZiPS.
Position players (17 wins)
Catcher: Andrew Susac/Jett Bandy (2 wins)
First Base: Eric Thames (2 wins)
Second Base: Johnathan Villar (3 wins)
Third Base: Travis Shaw/Hernan Perez (3 wins)
Short Stop: Orlando Arcia (2 wins)
Left Field: Ryan Braun (2 wins)
Center Field: Keon Broxton (2 wins)
Right Field: Domingo Santana (1 win)
Starting Pitchers (7 wins)
Junior Guerra (2 wins)
Zach Davies (3 wins)
Wily Peralta (1 win)
Chase Anderson (1 win)
Matt Garza (0 wins)
Bullpen (2 wins)
For comparison sake, here are my unscientific WAR projections from 3 weeks ago.