Kevin Kolb's star-crossed career in Arizona has taken another hit.
The Cardinals announced Tuesday that Kolb has rib cartilage damage and will be sidelined for ''an unspecified period of time.''
Kolb, who took over when starter John Skelton went down in the opener and directed the game-winning drive, had the team at 4-2 despite weak play by his offensive line that had him sacked 22 times in the last three games.
The job will revert to Skelton, who beat out Kolb in the preseason and just now is returning to health from a sprained left ankle. Skelton was active on Sunday for the first time since the injury.
Kolb also has a sprained sternoclavicular joint. Known commonly as the SC joint, it connects the breastbone to the collar bone.
The damage was discovered in an MRI on Monday. The exam did not show any fractures on the ribs or sternum, which would have been far more serious.
The injury comes with Arizona entering arguably the toughest stretch of its schedule.
Kolb will miss S...