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PFF grades, stats for 49ers-Raiders

Pro Football Focus broke down the 49ers-Raiders game. We take a look at some of their grades and stats.

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Cary Edmondson-USA TODAY Sports

We are a few days removed, but I wanted to make sure and get you all some of the notable San Francisco grades and stats from Pro Football Focus following their loss to the Oakland Raiders. It was not a pretty game, and naturally the numbers reflect that.

If you have any questions about this info, let me know. I can't go in and copy and paste all their content here because they make a living off that information. However, I can provide some details. And if you have any questions about their process, let me know and I can talk to Jeff Deeney, who is available to answer questions as best he can. You can also read over PFF's ReFo for the game.

Usual disclaimer: No one stat or grade or measurement is the be-all, end-all when analyzing performance. However, each stat can provide a little something extra to figuring out the bigger picture. If you get a minute, I highly recommend reading this 2-part series (Part 1Part 2) at our Eagles blog, taking a look at their system.

Dontae Johnson struggles a bit

The 49ers lost cornerback Chris Culliver to a knee injury fairly early in the game, and this resulted in more playing time for Dontae Johnson. He had started the game as the nickel back, but moved outside with Culliver's injury. He finished the game with a -1.3 coverage grade, which was his worst coverage grade since Week 2 against the Chicago Bears (-1.4).

Johnson was targeted four times, and gave up four receptions for 59 yards and a touchdown. PFF listed him as giving up two receptions for 20 yards to Marcel Reese, one reception for 19 yards to Mychal Rivera, and one reception for 20 yards to Vincent Brown. I want to go back and check out the film on those plays, considering Reese is a fullback and Rivera is a tight end.

Offensive line was not entirely awful

We'll have more on the offensive line, but for now, PFF had the biggest struggles belonging to center Marcus Martin. They currently rank him No. 32 among 41 centers. It has been a rough year for Martin, but with a full offseason ahead of him, let's hope it is just getting through the choppy waters early in his career.

Here are the OL grades from Sunday:

Joe Staley: 1.2 overall, 1.2 pass block, -0.3 run block
Mike Iupati: -0.3 overall, 0.5 pass block, -0.9 run block
Marcus Martin: -3.9 overall, -2.1 pass block, -1.9 run block
Alex Boone: 2.7 overall, 1.8 pass block, 0.7 run block
Jonathan Martin: 0.6 overall, 1.7 pass block, -1.3 run block

Kap struggled

I realize this is absolutely shocking news to all of you. Colin Kaepernick finished the game with an overall grade of -5.1. That included -1.4 in penalties thanks to the three delay of games the offense took. Over the last two weeks, Kap is 4 of 24 for 76 yards and four interceptions on passes downfield of 10+ yards. That comes out to a passer rating of 0.7. When pressured, Kap was 2-8 for 19 yards and an interception (0.0 passer rating), was sacked five times, and scrambled across LOS twice.

Pass rush is not there

Raiders QB Derek Carr got all kinds of time on Sunday, but even when he was pressured, he found success. When pressured, Carr was 6 of 7 for 93 yards (118.8 rating). He was also 7 of 10 for 149 yards on throws of 10+ yards downfield.

Aldon Smith got five quarterback hurries, but PFF only graded him out at 0.1 in the pass rush. Aaron Lynch rushed the passer 14 times, but only managed one pressure on Carr. Justin Smith, Dan Skuta, Tony Jerod-Eddie, Quinton Dial each had one pressure as well.

Chris Borland handles the run

The 49ers rookie linebacker finished the game with a +2.6 overall grade, but it came due to a +4.6 against the run. He had 13 solo tackles, and eight stops. However, he had a -1.9 grade in coverage, allowing five catches for 77 yards. The coverage issues are not a new problem, but something to keep in mind heading into the offseason.

Quinton Dial gets work

He finished the game with a season high 46 snaps, including 17 in the team's nickel defense. He finished the game with a -1.2 grade. Dial hasn't exactly wow'd in his first season, but it has been a big learning experience for him. Once the team lost Ian Williams, and not knowing exactly when Glenn Dorsey would return to action, the second year lineman has gotten the nose tackle work.

Given that the 2013 draft has been circling the drain at times outside of Eric Reid, it is nice to at least see someone else getting a decent amount of work. The 49ers will bring back Dial, Williams and Dorsey in 2015, which means plenty of competition at nose tackle.