San Francisco 49ers quarterback Alex Smith celebrates at the end of a win over the Detroit Lions during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. San Francisco won 27-19. (AP Photo/Tony Avelar)

Associated Press
San Francisco 49ers quarterback Alex Smith celebrates at the end of a win over the Detroit Lions during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. San Francisco won 27-19.  (AP Photo/Tony Avelar)
San Francisco 49ers quarterback Alex Smith celebrates at the end of a win over the Detroit Lions during an NFL football game in San Francisco, Sunday, Sept. 16, 2012. San Francisco won 27-19. (AP Photo/Tony Avelar)
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