Kolb sustained a concussion in the first quarter of last Sunday's win over the San Francisco 49ers, the fifth-year veteran's second game back after missing four weeks with a foot/toe injury.
Acquired from the Philadelphia Eagles after the lockout was lifted, Kolb has had an up-and-down first season with the Cardinals. After passing for 560 yards with four touchdowns and one interception in the first two games, Kolb was intercepted seven times in five games and suffered the foot injury as the Cardinals dropped five straight to fall to 1-6 on the season.
Second-year quarterback John Skelton helped revive the Cardinals' season, leading the team to three wins in four starts before yielding to Kolb in the team's overtime win against the Dallas Cowboys in Week 13. If Kolb is unable to play against the Cleveland Browns on Sunday, Skelton would get the start.
For more on the Kolb and the Cardinals, be sure to visit Revenge of the Birds.