While Carlos Marmol is in "rehab", wouldn't it be a good idea to have him work on keeping his left shoulder closed. He throws himself over toward first base as he delivers. This cannot be good for his control.
He has been doing this for a long time. If he would be asked to change, it may be difficult, but it would be better than never being effective again.
He throws so hard. Maybe he could throw even harder if he would tweek his delivery.