Woodson, Law can still be useful

Almost a month into free agency, this has been one of the most active signing periods in recent history. Teams have been able to add Pro Bowl-caliber players and fill needs with role players who fit their systems. Some teams have done an excellent job of improving their outlook for next season, while others have done very little to upgrade their rosters.

For teams that have not been very active, it is not too late to jump into the free agency fray. Three excellent players are left on the open market, capable of making an immediate impact. These are players with the ability to change a game.

LaVar Arrington -- Arrington is far and away the most explosive player left on the market. The Redskins' decision not to use him last season seemed more personal than about X's and O's. When they did decide to play Arrington, he was extremely effective.