Hard to say. Offensive line is one of those positions where I know a good one when I see it and I know w bad one when I see it. But I have a hard time telling why one is good and one is bad. Is it coaching? The talent on the line?
So I won't grade Cristobal so much as I'll grade the offensive line play. If 2011 was an A+, I'll give this year a B. Pretty good at pass protection; just ok at run blocking.
Again, not sure if that is a reflection of Cristobal or the fact that the 2011 line had 4 NFL caliber players.