In all likelihood, the Red Sox are done with the heavy lifting portion of their offseason. Granted, that is not set in stone and there could be other moves, whether in free agency or on the trade market, coming, but it seems more plausible that anything else will be more peripheral. They certainly haven’t had a knockout winter, as their additions have been more complimentary than star-caliber, but they’ve filled most of the holes. Their rotation is likely set beyond some possible minor-league depth signings. The bullpen could maybe have another piece added, but Adam Ottavino is likely the most expensive addition.