The Arizona Cardinals placed quarterback Kevin Kolb on season-ending injured reserve Wednesday.
Kolb led the Cardinals to a 4-0 start before he was sidelined with a rib injury in a game against Buffalo. Arizona has spiraled downward with nine straight losses in Kolb's absence.
In his place, the Cardinals have used John Skelton and rookie Ryan Lindley this season with little success.
Since Kolb came to Arizona from Philadelphia two years ago, injuries have limited him to 15 games and left his future in doubt with the Cardinals. His contract calls for a salary of $9 million in 2013 and a $2 million roster bonus in March.
To fill Kolb's roster spot, the Cardinals signed former Seattle and Philadelphia offensive lineman Mike Gibson.