The Seattle Seahawks shuffled their offensive line in the preseason in part to get Gary Gilliam on the field at right tackle. The other part was that the line looked horrible in practice and against Denver, and the Seahawks had to try and do something to fix things.
To get an idea of what the Seahawks have in Gilliam, I loaded up the game tape from all three games since he was inserted with the starters and looked at every snap he played. The results were mixed, but overall he looked like a nice upgrade over anyone that has played there in recent years.