Do you think he is a number 3 d-man on a team who has one of the top 10 groups of defense in the NHL?
I think he can be a second pairing guy, but there is a big difference between being a number 3 who can help out number 4 compared to being the number 4 who is well supported on the pairing.
Based on the lack of constancy and frequent soft play, I think he is more of a 4 than a 3. However, some nights he looks great and plays like he could be a 2.