I think ultimately Hader never moves from the bullpen unless the Brewers have a clear need in the rotation. This year that seems unlikely to happen given our 3 top minor league arms (Woodruff/Peralta/Burnes) would be more suited to immediately move into the rotation and get their chance to help the team, plus Nelson set to return midseason. If Davies' injury turns out to be worst-case scenario and he misses a bunch of time, you'd still have Anderson/Chacin/Woodruff/Suter/Peralta with Barnes set to fill in and Nelson on the way back (wouldn't rule out Miley making a couple more starts this year either). As for next year, that would depend on a lot of things. Can Nelson return and be effective? How are Woodruff/Burnes/Peralta looking? Is Suter a rotation option anymore? Are we sticking with Chacin for a 2nd year? There could be an opening there for Hader to get his shot in the rotation, or maybe not, we probably won't know until the end of this season or maybe later than that. If Peralta can stick in the rotation, that might also let Stearns go trade Woodruff or Burnes for some help at 2B or C. Basically I'd love to see Hader get a shot in the rotation but as long as he continues to be a dominant reliever in multi-inning stretches I'm not going to sweat it too much, especially mid-season. A mid-season shift to the rotation might be useful for building up innings for next year though, but on a competing team it'll be hard to make that shift.