The Pirates have had some bullpen problems this year. They’ve had some rotation problems as well, but the solution there is easy — wait until Tyler Glasnow and Jameson Taillon are ready, and hope for the best from Jeff Locke, Juan Nicasio, and/or Jon Niese in the few remaining starts until the prospects arrive.
But the bullpen problems aren’t as simple. This isn’t a situation where you can just call up a prospect and fix things. The Pirates had one of the best bullpens in the NL last year, ranking second in WAR, fourth in xFIP, first in WPA, first in shutdowns, and second to last in meltdowns.