The big (really big) man for the Green Bay Packers was the 2010 Erik Walden of the defensive line; a player brought in mid-season who gave their defense a boost. In the case of Howard Green, he was claimed after being released in October 2010 by the Jets. He came in when Cullen Jenkins and Ryan Pickett were both hurting, and depth was at a premium. He showed surprising hustle for a man of his size (6-2, 340 lbs).
He's not a pass rusher, but his best play was during the Super Bowl, when he got a strong push up the middle and hit Ben Roethlisberger's arm as he was throwing deep. The pass ended up hanging in the air, it was intercepted by S Nick Collins, and he returned it for a touchdown.
I was expecting more of the same from him in 2011, but he wasn't the same player that he was in 2010. He didn't show the same hustle as he did before, and, by the end of the season, he was usually inactive on Sunday. I don't expect the Packers will even offer him a contract.