The men that stand in at linebacker have arguably the toughest job on the football field (on the defensive side, that is). That is because they must adapt to any situation thrown at them, whether it is covering the QB and helping clog the middle for an inside run, or having to cover some of the more fierce slot-receivers in the game.
Most of the guys at this position are the leaders of their defensive corp. Ray Lewis in Baltimore is an obvious example and, when we look back, Tedy Bruschi with New England is another one. They have the best eyes and have a better idea of what play might be coming up, and call the audible.
The free agency period may not be upon us as of yet, due to the ongoing labor issue, but here are my power rankings of 10 players at the linebacker position who could be available when that free agency period finally comes.