SF 49ers grades, analysis from gutsy Week 13 win vs. Dolphins

49ers Week 13 grades: Defense

Defensive Line:

The 49ers defensive line has already been the crown jewel of the top defense in the NFL, but it took on an extra dimension with the return of defensive tackle Arik Armstead. He didn’t have a big day on the stat sheet, but forced the pressure that caused the first interception for Tua Tagovailoa.

But as usual the MVP was EDGE Nick Bosa, who recorded three sacks as he absolutely feasted on the backup tackles of the Miami offensive line. Those three sacks now make him the leader in the NFL, as he continues to push his claim for Defensive Player of the Year.

The line also did its job defending the rush. They’re the best defense in the NFL for a reason, as former 49ers Raheem Mostert and Jeff Wilson didn’t make any inroads against their old team.

Grade: A

Linebackers:

Another week, another dominant display by the best linebacker duo in football with Fred Warner and Dre Greenlaw their usual starring selves for San Francisco.

Warner has been the shining light most weeks but this week it was Greenlaw’s turn to be the dominant linebacker, culminating in his fumble return for a touchdown that all but iced the game for the 49ers.

Warner had a good game too, and his interception at the end of the game officially put the final stamp on things.

Grade: A

Defensive Backs:

A bit of a mixed bag here for the defensive backs, as Tashaun Gipson and Charvarius Ward were beaten badly in coverage on both of Miami’s long touchdowns. Gipson took a very bad angle while in fairness to Ward was expecting help from Talanoa Hufanga that never came, so perhaps the blame is on the talented safety instead.

On the other hand both Jimmie Ward and Deommodore Lenoir came up with big interceptions to help stifle the Dolphins offense. Call that a split performance for the game.

Grade: C+