San Francisco 49ers linebacker Aldon Smith (99) walks on the field during the fourth quarter of an NFL football game against the Indianapolis Colts in San Francisco, Sunday, Sept. 22, 2013. (AP Photo/Marcio Jose Sanchez)

Photo by: Marcio Jose Sanchez

San Francisco 49ers linebacker Aldon Smith (99) walks on the field during the fourth quarter of an NFL football game against the Indianapolis Colts in San Francisco, Sunday, Sept. 22, 2013. (AP Photo/Marcio Jose Sanchez)