Hector Amezcua/hamezcua@sacbee.com

San Francisco 49ers tackle Joe Staley (74) fights with Green Bay Packers outside linebacker Clay Matthews (52) after he shoved San Francisco 49ers quarterback Colin Kaepernick (7) to the ground as he went out of bounds during the San Francisco 49ers home opener against the Green Bay Packers on Sunday, Sept. 8, 2013, at Candlestick Park in San Francisco.

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