Via Read a Bet and their AFC West predictions:
The bookies see Kansas City as the most likely challengers to the Broncos. Personally, I just don't see it happening. Firstly, history is against the Chiefs as since its inception in 1960, the franchise has never won a division crown in its first season under a new coach. Secondly, while the defense should be stronger with a couple of additions, the offence may suffer badly with the retirement of Willie Roaf.
The Chiefs are talented enough to make the playoffs as a wild-card team, but many things need to fall into place. As a result the best price 12/5 on offer for the division title is simply too short to consider.