You seem pretty certain that this guy is at best a jag, (I personally have no idea, never heard of him until now) so I wonder if you have some tape or something with his time with Buffalo that shows us what a mistake this signing is. Some stats about his starts or something. Because so far what I've heard is that he went undrafted, was cut by his original drafting team, picked up by Buffalo and was a back-up behind a good Center who the Bills signed for a lot of money. But, he started 7 games due to the starter's injury. And apparently Buffalo would have been glad to have him back...as a back-up. And from this, an assumption that he isn't anything for us to be glad about.
I'm not sure any of this tells us much about how well or poorly he pass blocks, rush blocks, makes the line calls,etc. I'm also not sure anyone (well, at least I'm not) expecting him to be All-Pro. If he can upgrade the position somewhat and be consistently competent, that would be a significant help. If he can't, well, it was indeed a poor signing.