The 49ers had a dismal performance in their 13-3 loss to the Seattle Seahawks and their PFF grades show where the biggest problems were. The defense only allowed the Seahawks 13 points, which normally would be enough to secure a win, but the 49ers offense did not hold up its end of the bargain. Kicker Eddy Piñeiro’s 47-yard field goal put the only 49ers points on the board. Watch NBC Bay Area News free wherever you are WATCH HERE San Francisco's offensive line allowed 15 total pressures, causing quarterback Brock Purdy to scramble during much of the game. When Purdy was kept...