Any list that has DLS as part of a solution is clearly a joke right? There is almost no chance that he will be anything but batting practice in the majors.
Your list emphasizes my point:
Suarez... hasnt pitched very well at AAA, no reason to expect anything from him. Had a good partial season in the majors, regressed to more like what he probably is.
Romero ...ERA of almost 7 in AAA in 53 innings. Was highly thought of, has dropped WAY down
Russo.... ERA of 5.50 in AAA (14 games).
Brogdon .... there is hope for him
This is not a list of prospects, this is a list of dreams. Brogdon probably plays in the majors, there others appear to be AAA or AAAA pitchers unless something changes. DLS is certainly not someone to think will ever contribute and the fact that you got to him on your list just shows how little immediate assistance we have for the bullpen.
All of these guys are 24-26 or older. A list like this with these stats of 22 year olds in AAA is exciting, but these are guys that have filled out, are at or near their primes and are getting beat up in AAA (except Brogdon). Maybe we get lucky with one of them, but odds are heavily against all of the others to ever turn into anything more than guys you call up when your bullpen is depleted and you throw out there when the game is already out of hand. They will probably all pitch in the majors during the next 2 years, occasionally, but the odds of any of them even generating 1.0 WAR is wildly against them (Brogdon excepted, but he is hardly a big prospect either).