Total QBR measures nearly every aspect of quarterback play including passing, designed runs, scrambles, turnovers and penalties. QBR also strives to separate the performance of the individual quarterback from the rest of his team, in order to rate the overall efficiency of each quarterback in the league, also accounting for opposing defenses; quarterbacks who face tougher defenses will have their ratings adjusted upward in proportion to the difficulty of their opposition, and those who face weaker defenses will have their ratings adjusted downward. The new, adjusted QBR is now the number you'll find under the "Total QBR" column at the QBR page.
Updated Total QBR rankings entering Week 13 of the NFL season
