So they should only try to improve one roster spot at a time? Why not bring up two or three guys to help out? With as much as the pen is getting used lately, fresh arms are hard to come by. That spot could also be filled with another bat off the bench, though that will have to come from AA or outside the organization I imagine. Duffey alone, even if he does become effective, isn't going to fix the pen. If you're trying to improve the bullpen, it'll take more than figuring out what to do with the 24th spot. That locked in spot and having/not having the ability to make multiple changes at a time makes that point very relevant. That's not even considering how it handcuffs the manager. They have younger guys in AAA that are pushing to be brought up. I'd rather they take their lumps now than in July or August. As I see it, Kinley is blocking their progression. In my view, it's really not worth taking a flier and tying up a roster spot on a 27 year old that has a fairly unimpressive resume in the minors when there are younger, more accomplished relievers in the minors ready to come up and contribute.