There's a chance that Buch won't come back and be what he was a the start of the season. He has a WHIP above 2 and hasn't pitched over 3.1 in either of his starts. We just have no idea what he can come back and be. To me, Doubront is the safer bet. Buchholz may have higher upside, but there's also the risk that he won't be ready and could completely s*** the bed. I think Buchholz could have value in the pen if his stamina doesn't come back.