San Francisco 49ers running back Frank Gore, right, carries the ball past Detroit Lions defensive back Drayton Florence, left, during the second quarter of an NFL football game in San Francisco, Sunday, Sept. 16, 2012. (AP Photo/Tony Avelar)
San Francisco 49ers running back Frank Gore (21) runs against the New York Giants in the first quarter of an NFL football game in San Francisco, Sunday, Nov. 13, 2011. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers running back Frank Gore (21) tries to break free from Washington Redskins inside linebacker London Fletcher while rushing the ball in the first half of an NFL football game in Landover, Md., Sunday, Nov. 6, 2011. (AP Photo/Pablo Martinez Monsivais)
Washington Redskins Adam Carriker (94) can't stop San Francisco 49ers Frank Gore (21) from picking up 14 yards during the first quarter. (Andrew Harnik / The Washington Times)
San Francisco 49ers running back Frank Gore is brought down by a wall of Philadelphia Eagles defenders during an NFL football game Sunday, Oct. 2, 2011, in Philadelphia. (AP Photo/The News-Journal, Suchat Pederson) NO SALES