Provided the CBA allows this, I would not oppose the Sox offering him a shot in Charlotte. If he is healthy, and if he performs well during the next six weeks, call him up on Aug 31 to help the big league bullpen and perhaps make the postseason roster. If he fails the Knights in August or the Sox in September, cut ties. But if he can throw his nasty curve for strikes, he can get big strikeouts in big games against almost anyone except the Twins and Orioles.
The Sox are short on veteran relievers, and this would be a no-risk roll of the dice on a reliever with previous postseason success.
The universe is the practical joke of the General at the expense of the Particular, quoth Frater Perdurabo, and laughed. The disciples nearest him wept, seeing the Universal Sorrow. Others laughed, seeing the Universal Joke. Others wept. Others laughed. Others wept because they couldn't see the Joke, and others laughed lest they should be thought not to see the Joke. But though FRATER laughed openly, he wept secretly; and really he neither laughed nor wept. Nor did he mean what he said.