Even the best NFL teams have a hard time moving forward every single year.
The Houston Texans are no exception. They saw their rankings in a key statistical indicator decline in 2012.
The Advanced Stat of the Week this week is Passer Rating Differential.
Passer rating has scores of critics. The most common complaints are that it overvalues completion percentage, it has no opponent adjustment, it has no way of adjusting for game situation, it doesn't value running at all, it doesn't account for sacks or fumbles, it is ridiculously hard to calculate and it was scaled in the 1970s, making it notoriously useless for comparing quarterbacks of different eras.