There are a few different ways Addazio can go with this new opportunity. He can promote from within and backfill the staff opening with hundreds of names. He can hire a first-time OC (like he did when he hired Day at Temple). Or he can hire a current OC who wants to come to BC. Most of Addazio's hires at Temple and BC have either worked with him in the past or had specific ties to the region or school. I expect this hire will follow that same pattern.
I don't know who Addazio will hire, but here are a group of names that might pop up:
(I don't think any of these guys would be Offensive Coordinator, but I could see them all come back as staffers if Addazio promotes Fitch.)
Brian St. Pierre
Friends of Addazio
(I don't think either of these guys would take the job -- for very different reasons -- but I bet Addazio will reach out to them.)
Guys who might want to be play callers
(The biggest appeal for some guys will be the title of the job and calling plays. That is the only way I see us getting some of these guys.)