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49ers defensive snap count: Ahmad Brooks gets to the QB, Dontae Johnson starts

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The San Francisco 49ers looked ready to give the Detroit Lions a nice little fight in the first half on Sunday, with the offense jumping out to a solid start. The defense had its struggles in the first half, jumping offsides in some form or fashion six different times. They finished with seven such penalties. I did not include them in player stats, and we'll take a look at them separately.

And yet, they also had some solid moments, and the game was competitive through the first half (the magic word!). Things went south though, and the 49ers could not get back into it as the second half wore one. As always, the snap count does not reveal everything, but we can make some pretty specific inferences based on it. I thought we would start by looking at the defensive side of the ball (Gamebook PDF).

Defensive Line

Pos Player Plays % Stats
DT Ian Williams
45 63% 5 tackles, 1 assist, 1 pass defense
DT Mike Purcell
37
52% 2 tackles,
DT Quinton Dial
30
42% 1 tackle, 3 assists, 1 QB hit
DT Tony Jerod-Eddie
25
35% 3 tackles, 1 assist
DT Arik Armstead 22
31% 2 tackles
DT Tony Jerod-Eddie 17
24% 3 tackles, 1 assist

The 49ers did solid work against the run, holding the Lions to 87 yards on 28 carries. Of course, the Lions are not built to be a running team. The 49ers struggled getting much pressure on Matthew Stafford, with Arik Armstead and Tank Carradine both failing to secure a QB pressure. Ian Williams continues to play some really strong football. His free agency is going to be interesting, to say the least.

Outside Linebackers

Pos Player Plays % Stats
OLB Aaron Lynch 54 76% 1 assist
OLB Ahmad Brooks
49 69% 1 tackle, 2 assists, 1.5 sacks, 1 tackle for loss, 2 QB hits
OLB Eli Harold
22 31% 1 assist, 1 QB hit

Ahmad Brooks quite the day, getting some decent pressure on Stafford. Eli Harold got a hit as well. The "good news" would be that Aaron Lynch came back and got plenty of work in. He missed two games with a concussion, so getting him on the field was a big plus/

Inside Linebackers

Pos Player Plays % Stats
ILB NaVorro Bowman 71 100% 8 tackles, 2 assists, 0.5 sacks, 1 QB hit
ILB Gerald Hodges
60 85% 5 tackles, 4 assists

Another busy day for the inside linebackers. NaVorro Bowman continues to get every snap, and is now the NFL leader in tackles. While tackles are not a great measuring stick (Derek Smith had a whole bunch on a bad 49ers defense), it is good for purposes of recognizing Bowman's continued return from his knee injury.

Cornerbacks

Pos Player Plays % Stats
CB Dontae Johnson 70 99% 3 tackles, 1 pass defense, 4 recs (5 tgts) for 63 yards, 1 TD
CB Tramaine Brock 68 96% 3 tackles, 1 pass defense, 2 recs (3 tgts) for 7 yards, 1 TD
CB Jimmie Ward
55
77% 2 tackles
CB Kenneth Acker 11 15% 1 tackle, 2 recs (2 tgts) for 30 yards
CB Marcus Cromartie 3 4% 0 recs (1 tgt)

The gamebook lists Jimmie Ward as the second starting cornerback for some reason, but Dontae Johnson got the work. This is Johnson's second straight week getting the bulk of the snaps opposite Tramaine Brock. I suspect it continues in Week 17, but who knows with this coaching staff.

Safeties

Pos Player Plays % Stats
S Eric Reid 71 100% 5 tackles, 1 assist, 3 missed tackles
S Jaquiski Tartt
71 100% 3 tackles, 3 missed tackles

Another busy day for the safeties, and Jaquiski Tartt continues to struggle with missed tackles. We'll break down more of his work this offseason, but since moving into the starting lineup in Week 8, Pro Football Focus has marked him down for 12 missed tackles. They say that is tied for the league lead among safeties.