On a team that isn't expected to contend for a couple years, every player is available for a price. Since they can afford to wait out any growing pains, his value to the Brewers should be based on his potential rather than his current production and is likely higher than other teams value him, but you definitely listen to offers if teams are interested. If we were contending for a playoff spot and Nelson was our best pitcher, then it'd be silly to trade him, but that's not the situation this year and likely won't be for at least a couple more seasons. In two years, they can have Nelson and Hader as 1-2 in their rotation in either order. That's assuming of course Hader's not making his 75th or so start in AA. That alone can make their rotation worthy of wild card contenders unless they purposely are trying not to be. The problem is you are projecting Nelson to be a #1/#2 when he's only our #1 by default, and you are projecting Hader to be a #1/#2. We don't know if Hader will even stick in the rotation yet, much less at the top of it. Realistically, Nelson and Hader aren't the top 2 starters on a contending team unless they have 3 other equally competent starters also in the rotation. For it to play out the way you say, pretty much every best case scenario in the career's of Nelson and Hader has to come into play. That's way too much to expect IMO, much like many of us 2 years ago expected Peralta to be an ace by now. We have a long ways to go to rebuild this rotation.