Total QBR: Peyton Manning is No. 1

A look at the AFC West Total QBR leaders through Week 6:

1. Peyton Manning, Denver

Total QBR: 79.4

NFL rank: 1

Comment: Manning is seriously in the MVP conversation.

2. Carson Palmer, Oakland

Total QBR: 51.1

NFL rank: 20

Comment: Key mistakes undo the good things Palmer does.

3. Matt Cassel, Kansas City

Total QBR: 44.7

NFL rank: 24

Comment: Brady Quinn didn’t do much to keep the job away from an injured Matt Cassel in Week 6.

4. Philip Rivers, San Diego

Total QBR: 41.2

NFL rank: 27

Comment: Rivers’ second-half nightmare Monday night caused him to plummet on this list.