The Patriots made an upgrade on defense with Milton Williams, but how can they improve the offensive line and at receiver?

The New England Patriots have certainly spent a bunch of money, but not in the areas you would expect, as they sunk the majority of their cash into addressing the defense. They handed a four-year, $104 million contract to defensive tackle Milton Williams.

The Patriots were active in the first week of NFL free agency, but questions remain at left tackle, left guard, and center.