It would seem that the Red Sox are basically done assembling their 2021 major league roster. The team could still add another reliever or two, or perhaps another spare part for the bench. But, for the most part, what you see is what you get -- at least in terms of significant players.
Understand that there will be lots of movable parts on this roster for Alex Cora to manage. Two free agents -- Kiké Hernandez and Marwin Gonzalez -- will get to demonstrate their versatility plenty. In turn, that will make it difficult to project an "everyday'' lineup, since, in all likelihood, such a thing won't exist.