A look at the AFC West Total QBR season leaders through Week 12:
1. Peyton Manning, Denver
Total QBR: 79.5
NFL rank: 2
Comment: Manning’s numbers are dipping slightly.
2. Carson Palmer, Oakland
Total QBR: 42.5
NFL rank: 27
Comment: Palmer could do very little against his former team in Cincinnati.
3. Philip Rivers, San Diego
Total QBR: 41.1
NFL rank: 28
Comment: At some point, he’ll need some help.
4. Matt Cassel, Kansas City
Total QBR: 36.5
NFL rank: 31
Comment: New starter Brady Quinn hasn’t played enough to be ranked. It wouldn’t be very high, anyway.