San Francisco 49ers head coach Mike Singletary looks on during the second half of a preseason NFL football game against the San Diego Chargers in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Marcio Jose Sanchez)

AP
San Francisco 49ers head coach Mike Singletary looks on during the second half of a preseason NFL football game against the San Diego Chargers in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers head coach Mike Singletary looks on during the second half of a preseason NFL football game against the San Diego Chargers in San Francisco, Thursday, Sept. 2, 2010.
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