Most of those guys will not take minors contracts. The depth is Webster and De La Rosa, if both could come up and make a few quality starts like Tazawa did (beating the Tigers and Yankees) from 2009, it's better than any reclamation projects. After many fail projects in recent years (Smoltz, Penny, Cook, etc) it just better to give the prospects a chance now they actually have the pieces. Doubront was injured a lot in between those years and wasn't able to plug in the necessary spot starts.