Buchholz is probably going to open on the DL so they can carry Hernandez and Pompey if they go with a 4-man bench and 7 relievers. I think that makes sense, because they're not facing any immediate roster crunch on the pitching end. The bullpen right now is:
Giles
Norris
Tepera
Biagini
Mayza
So they can still roster Lucianio if they want to, plus one of the guys with options (Gaviglio, Pannone, Paulino, Thornton). I guess it depends how much they care about losing Pompey, because I don't think Hernandez is being optioned.