Who has so far emerged as a Norris contender/favorite in your opinion?
Thomas Chabot.
In all seriousness, it seems that defensemen must play a lot of minutes and be a two-way force in order to be a favourite. That’s logical, and means that your top contenders right now are probably Doughty, Carlson, Suter, Letang, Karlsson, Klingberg, Klingberg, Byfuglien, Pietrangelo, Lindholm, etc. If Reilly breaks 70, 75 points he’ll be a strong contender, too.
At the moment, my top-3 would be Doughty, Suter, and Letang, who’s been a beast this season in every situation after looking off the last couple of years due to injury and fatigue. Guys like Karlsson and Josi get punished a bit by being just a part of very strong defensive corps.