If the Sox deal with Napoli fell through, it would have fallen through by now. That organization would have cut ties very quickly in order to spring on another FA. I think they are restructuring the contract like they did with J.D. Drew.
Edes via the linked article:
Saturday, multiple sources confirmed that Napoli's hip is the primary issue holding up the deal, but said simply adding contract language protecting the Sox as a remedy in case it proves to be debilitating may not be enough to salvage the agreement. Such contract language was inserted in prior deals the Sox did with outfielder J.D. Drew and pitcher John Lackey.