If used as a SuA, he could essentially be a one-man bullpen. I've had guys that can shut down the opposition (more often than not) two innings every other game, but this guy will probably crack 200 IP a couple times in his career out of the 'pen.
These types of pitchers are among the most valuable commodities in this game, IMO. As long as you have a solid closer, the rest of your bullpen is pretty much nonessential.