Hader entered last season as arguably the top left-handed starting pitching prospect in the game, but he got off to a slow start at the Triple-A level as he struggled to harness his electric stuff. While he was not ready to join the starting rotation in 2017, the Brewers did decide he was good enough to pitch out of the bullpen and called him up as a reliever in June. The move turned out to be a stroke of genius, as he overpowered opposing hitters, particularly of the left-handed variety, who combined to hit .140 while posting just one extra-base hit against Hader. It’s almost certain he won’t be able to pitch in the same manner as last year, when he mainly needed only his mid-90s fastball to get opponents out, but his slider can be devastating as well. The Brewers will at least consider using Hader as a starter again, but his stuff may not play as well in that role, and the team could decide he is plenty useful as one of the best left-handed relievers in the league. That could maximize his value for the 2018 Brewers, but would also put a cap on his fantasy upside.