Alex Smith out for 49ers against Chicago Bears

November 19, 2012 (SAN FRANCISCO)

San Francisco 49ers quarterback Alex Smith will not play Monday night against the Chicago Bears because he was unable to get clearance from a neurologist one week after suffering a concussion, according to sources.

Colin Kaepernick will start in Smith's place in a game that also will feature Jason Campbell as the Bears' starter because Jay Cutler has been declared out, also because of a concussion.

Smith, who is ranked third in the NFL with a 104.1 passer rating, practiced in a noncontact black jersey last week and took part in most of the drills involving the first-team offense.

Smith, who has made 28 consecutive starts, was injured during the first half of a 24-24 tie with the St. Louis Rams in Week 10 and left the game midway through the second quarter.

Kaepernick replaced Smith after the injury and was 11-of-17 for 117 yards and rushed for 66 yards and a touchdown against St. Louis.

Information from The Associated Press was used in this report.

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