One of the stronger aspects of the Jaguars defense in 2011 and a large factor for the strong turnaround has been the play of the linebackers. While Clint Session has still seen less than 50% of the defensive snaps, his contributions during his times on the field have generally been strong, while Paul Posluszny and Daryl Smith have done a great job in the middle of the defense.
However, the linebacker position could prove to be a weakness against the Steelers as it's possible both Session and Smith could sit out of the week six matchup. Session is nursing an elbow injury that held him out of Thursday and Friday practices, and limited him in practice on Wednesday. He has already been listed as out for Sunday's game.
Smith has seen a light practice load this week too and is listed on the injury report with a head injury. Considering the fact that he's worn sunglasses in each of the practices this week, it's pretty apparent that he was diagnosed with a concussion.
In the event that both Session and Smith are out of the game on Sunday, the only other linebackers on the roster are Russell Allen and Kyle Bosworth. The good news, though, is that Smith has been listed as probable.