Total QBR: Manning back on top

A look at the AFC West Total QBR leaders through Week 13:

1. Peyton Manning, Denver

Total QBR: 81.1

NFL rank: 1

Comment: Manning overtook longtime rival Tom Brady at the top.

2. Carson Palmer, Oakland

Total QBR: 44.6

NFL rank: 26

Comment: Key interceptions sting Palmer.

3. Philip Rivers, San Diego

Total QBR: 39.2

NFL rank: 29

Comment: His play Sunday dipped in the second half.

4. Matt Cassel, Kansas City

Total QBR: 36.5

NFL rank: 31

Comment: Brady Quinn hasn’t played enough to qualify on the list yet. But he was terrific Sunday.