The Oakland Raiders are going to be without Jason Campbell, so it's understandable that their line against the Kansas City Chiefs has shrunk by a bit. It's a far more different scenario for the KC defense to deal with the inconsistent Kyle Boller rather than the steady Campbell.
Oakland is currently sitting on lines of around three, three-and-a-half, and four points where they're favored over Kansas City. The Raiders probably still have a decided advantage, but the uncertainty of the quarterback position (and whether Carson Palmer will be ready to go over Boller) throws a monkey wrench into the proceedings. While KC might not be the greatest team in the world, it is a divisional rival, so these games tend to be closer than usual. Just keep that in mind before you go all in on the Raiders as your pick of the week.