Could Redskins bring back Terrance Knighton to help in the middle?

When Terrance Knighton signed with the Patriots this offseason, word was the Redskins tried to talk him into staying in Washington up until the last minute. The man affectionately known as "Pot Roast" gave the 'Skins some good play at nose tackle in 2015, and the team and fans liked Knighton. The Redskins, however, may get the chance to bring back Knighton after all.