Who were the Twins relievers who should have been up and contributing in 2015? Meyer, maybe, after Sep 1st. But veteren relievers didn't stand in the way of that. Berrios, late in the year, although you'll get resistance from many here based on 40 man and/or innings limit theory. Other than that, NONE of them were both healthy and performing at a level that earned them a chance at a 40 man spot and a 25 man spot. Personally, before I put the 2016 season in the hands of pitchers who weren't ready to help in 2015, I let them perform at a level that at least reasonably demonstrates they can be successful immediately, or soon, after call up. And again, personally, I'd be pleasantly surprised if as many as two of them earn a promotion in 2016, so adding a proven veteran performer or two wouldn't be very likely to stand in anyone's way. If they do, that'd be a lot better problem than depending on them and finding out you don't have enough talent, rather than dealing with too much.