Not sure what use he'd be in the pen either. He has no command on any of his pitches. He's just a gas can at this point that has already been given a long leash. If he stinks today you start to consider waiving him and possibly getting some cash from a team with an open 40 man spot.
This literally might be his last appearance as a Sox. I'm rooting for the guy but he comes out at 91 tonight with his usual command it's over.