Howie and Simms: Who Have Been NFL's Best Free-Agent Signings?

With the free-agent system always packing loads of surprises in terms of talented players, it's hard to pick out just who were the best signings for this season.

Who were the top free-agent signings? Where does Terrance Knighton stand?

Find out in the above video as Adam Lefkoe and Bleacher Report NFL Analysts Chris Simms and Howie Long go in-depth on this season's best free-agent signings.