He has only been with the Rams for the past two years. He was with Carolina since their first year in the league and I remember him being a very solid center. I don't think he ever made it to the Pro Bowl, but I remember he was always one of the guys that was mentioned. He was their starting center the whole time he was in Carolina, but since he has been in St. Louis he has only started in the case of an injury, but has played in almost all of the other games. I think he would be a good guy to have as a top reserve who can play both guard spots and the center position, but would only be average as a starter.
One more thing...I think he is pretty much in the same mold as a Gruttadoria and the other Rams interior linemen in that he is not terribly overpowering, but he is a very smart player, has the experience to make all of the line calls, and is a solid pull blocker.