Given the abject lack of anything worthwhile in the farm system, I support the signing of ANY warm body that may or may not help. Honestly, the organization could really use any kind of depth at pretty much every position, IMO.
Absent this type of signing, any significant injury in the starting rotation [beyond Peavy] means that we'll be treated to the joy of Lucas Harrell as a SP for an extended period of time.
Is Brandon McCarthy still available? Sign him up if he is!