Pittsburgh Steelers defensive end Cameron Heyward (97) sacks San Francisco 49ers quarterback Colin Kaepernick (7) in the second quarter of an NFL football game, Sunday, Sept. 20, 2015, in Pittsburgh.
Pittsburgh Steelers defensive end Cameron Heyward (97) sacks San Francisco 49ers quarterback Colin Kaepernick (7) in the second quarter of an NFL football game, Sunday, Sept. 20, 2015, in Pittsburgh. Don Wright AP
Pittsburgh Steelers defensive end Cameron Heyward (97) sacks San Francisco 49ers quarterback Colin Kaepernick (7) in the second quarter of an NFL football game, Sunday, Sept. 20, 2015, in Pittsburgh. Don Wright AP

Report card: 49ers offense struggles, but defense is worse

September 20, 2015 02:42 PM