Gadzooks— Can the NFL... 
ever be wrong?
that is if the season ends today ....
GB has tiebreaker over AZ (Common games) if they both win and finish 12-4 ... but at 11-5, AZ has tiebreaker. (Common games would be tie because DET is a common opponent ... next is SOV which AZ has a strong advantage and clinched.)
see my annoying charts. It is almost impossible for AZ to be the #6 after week 17.
this is perdogg’s favorite site. they are a little slow on updates, but get it right in the end.
http://playoffstatus.com/nfl/nfcstandings.html
some of their odds are off, but they got the right teams in the right seeding.
Well, yes.
NFC West runner up is 5 seed UNLESS GB-DET is a TIE, then AZ will be 6 provided they also lose to SF.
http://espn.go.com/nfl/playoffs/machine
I copy this right off the NFL Playoff Machine
“1st Seed - Seattle
NFC West Champ
Wins tie break over Detroit based on best win percentage in common games.
5th Seed - Arizona
Wins tie break over Green Bay based on strength of victory.”