Detroit Lions quarterback Matthew Stafford before of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)

Photo by: Marcio Jose Sanchez

Detroit Lions quarterback Matthew Stafford before of an NFL football game against the San Francisco 49ers in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Marcio Jose Sanchez)