First pass, interception.
Second pass, well behind receiver Andre Roberts.
Third pass, thrown away while Kolb was on the run from pressure.
Fourth pass, completed under duress to fullback Anthony Sherman, but with a price. New Orleans Saints defensive tackle Sedrick Ellis tackled Kolb and landed on him, driving Kolb's throwing shoulder into the ground. Kolb left the game with what the team called a rib contusion.
Overall, Kolb completed 1 of 4 pass attempts for 4 yards. He was ineffective while playing and unable to break the streak of injuries that have marked his Arizona career to this point.
John Skelton has taken over for Kolb. His chances for winning the job have obviously improved, pending an injury update on Kolb from the Cardinals.
Rib injuries tend to be extremely painful. Players can often play through them, but only if they're willing to endure the excruciating pain. Some take pain injections, which themselves can be extremely painful when applied to the ribcage.