If they need a starter, they could stretch Hughes and place him in the rotation. They could be more inclined to do it, if the rest of the pen, Marte, Robertson, Aceves, Gaudin, Melancon and the rest, are doing a great job. Do you understand that? Jesus...
Remember 08, when they removed Joba from the pen to fill a rotation spot. They did it because the bullpen was doing great back then, it's exactly the same situation.
Hopefully, they'll stretch him out more slowly this time, and he won't go down with an injury. Hughes has an advantage because he has no history of arm related injuries.