THIS WEEK
The rise of the AFC? Cincinnati, Denver and Houston (yes, Houston), occupy the top three spots in this weeks rankings. Nobody can accuse me of being biased. Seattle took a big fall, but Detroit, Tennessee, San Francisco, Minnesota, Atlanta, Pittsburgh and the Jets fell further. The Bears at #5 does not seem like it will last, and Washington at #7 should grab every Seahawks fans attention as many were hoping for an easier game in a couple of weeks.

For those wondering how San Diego could be so far down in the rankings after beating a strong Seattle team, it comes down to their deplorable defense that is allowing a 112.7 passer rating to opposing quarterbacks and 5.6 yards per carry. Had the Seattle offense seen the field a typical amount of time, they might have hung 40 points on that team.



Scatter

This view helps to give you a view of how teams are grouped together. You will generally see tiers of strength develop as the season wears on.

RANKINGS EXPLAINED
Power rankings are always debatable. I don’t buy into the gut feel methods most places use to determine their rankings, so I developed a formula a few years back that attempts to take at least some of the subjectivity out of the discussion. My approach was simple, I measured offensive and defensive efficiency based on the Yards Per Carry (YPC) and Yards Per Attempt (YPA), as well as points scored and points allowed. The formula to calculate “Team Strength” was as follows:

(YPC (offense) + YPA (offense) + Avg Pts/Game Scored) – (YPC (defense) + YPA (defense)+ Avg Pts/Game Allowed)

The formula has proven to be a pretty accurate predictor of success, but I am always looking for ways to improve it. I read a great article on ColdHardFootballFacts.com. There was one gem in there about predicting championship teams. The article mentioned passer rating differential as the “mother of all stats.” A full 69 of 72 champions have ranked in the Top 10 in this statistic. It is a stat after my own heart, as I believe offensive and defensive efficiency is the key measurable outside of point differential. Turnovers would factor in there as well, but I am not convinced a team has as much control over that. My power rankings use YPA and YPC differentials. I went ahead and replaced the YPA with offensive and defensive passer rating, to give me this:

(YPC (offense) + Passer Rating (offense) + Avg Pts/Game Scored) – (OPP YPC (defense) + OPP Passer Rating (defense)+ OPP Avg Pts/Game)

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