The Red Sox are "open" to adding a complementary hitter in free agency, The Boston Globe's Alex Speier reported Saturday. Of course, the definition of complementary is up to anyone's interpretation. But for the sake of argument, let's assume that the likes of Alex Bregman, Kyle Tucker, Pete Alonso, Kyle Schwarber, Bo Bichette, Munetaka Murakami, and Eugenio Suarez are considered to be in one of the upper tiers of free-agent hitters.