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Patriots 2018 defense positional usage


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BobDigital

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You'll never get a direct answer out of the Patriots for how they want to use their defense and how they want to defend NFL offenses. The only thing we can do is look at what they did in the past and try to figure out what this means for the future.

While there is a bit of overlap with certain positions on defense I think it can tell us a lot about how much value Bill thinks these groups have and how much he plans to play them this year. This can give us a bit of a look into how he plans to build his roster and why he invest in the positions he does.

In 2018 the Patriots had 1,043 defensive snaps. That means the players on the field we needed a total of 11,473 defensive snaps. Pro Football Reference accounts for 11,472. Maybe they missed one or maybe I made an error in my math or maybe for one snaps the Pats screwed up and only had 10 guys on the field. In any case I was curious just how often BB wanted certain groups on the field or where he thought the talent on his roster was.

CBs had 2,943 snaps, Safeties had 2,548 snaps, LBs had 2,347 snaps, DE had 1,951 snaps, DTs had 1,678 snaps and offensive players had 5 defensive snaps (as DBs). Guy is listed as a DE but I counted him as a DT.

In other words on average the defense looked like this: 5.27 DBs, 2.25 LBs and 3.48 DLs.

No big surprises here really but it is a little informative. While the Patriots are considered a 4-2-5 teams they are just as likely to have 3 down line men as 4 on any given snap. When they don't have that 4th DL they are just about as likely to put another LB or DB on the field.

The Patriot were a bit more generous with their LBs last year than maybe some people suspected. On average we can assume he used 3 LBs 1/4th of the time and 2 LBs 3/4th of the time.

We also see within groups BB has not only devalued DL compared to other teams but DTs in particular. This may have been in part due to his roster. Anyway I just figured since I looked this info up I may as well post it and you can decide how useful or useless it is.
 
This aligns pretty well with the snap percentages I posted in the 2018/19 defense comparison thread. The 11 players who took the most defensive snaps last year formed a 3-2-6 defense with a line of Flowers-Brown-Guy. This made me wonder how often we actually ran packages with only one edge player, which seems unorthodox.
 
I'd love to know the breakdown of CB vs. S usage as the season ran down. Seemed Belichick was moving from a big nickel toward a multi-CB package.

Of course, the NFL 0f 2019 being as specialized and matchup based as it is nowadays, the line between S and CB is blurred for the likes of Jones, McCourty and potentially Williams.
 
Everyone behind the LB corps should be referred to as DBs on the Patriots. With Dawson and Joejuan joining the ranks, this defensive backfield will be an incredibly amorphous group.
 
Everyone behind the LB corps should be referred to as DBs on the Patriots. With Dawson and Joejuan joining the ranks, this defensive backfield will be an incredibly amorphous group.

Pretty much everyone on the backend is interchangeable and it makes the team so hard to game plan. Virtually everyone can line up as a corner or safety which causes teams to spend more time than they would studying matchups and game planning.
 
You'll never get a direct answer out of the Patriots for how they want to use their defense and how they want to defend NFL offenses. The only thing we can do is look at what they did in the past and try to figure out what this means for the future.

While there is a bit of overlap with certain positions on defense I think it can tell us a lot about how much value Bill thinks these groups have and how much he plans to play them this year. This can give us a bit of a look into how he plans to build his roster and why he invest in the positions he does.

In 2018 the Patriots had 1,043 defensive snaps. That means the players on the field we needed a total of 11,473 defensive snaps. Pro Football Reference accounts for 11,472. Maybe they missed one or maybe I made an error in my math or maybe for one snaps the Pats screwed up and only had 10 guys on the field. In any case I was curious just how often BB wanted certain groups on the field or where he thought the talent on his roster was.

CBs had 2,943 snaps, Safeties had 2,548 snaps, LBs had 2,347 snaps, DE had 1,951 snaps, DTs had 1,678 snaps and offensive players had 5 defensive snaps (as DBs). Guy is listed as a DE but I counted him as a DT.

In other words on average the defense looked like this: 5.27 DBs, 2.25 LBs and 3.48 DLs.

No big surprises here really but it is a little informative. While the Patriots are considered a 4-2-5 teams they are just as likely to have 3 down line men as 4 on any given snap. When they don't have that 4th DL they are just about as likely to put another LB or DB on the field.

The Patriot were a bit more generous with their LBs last year than maybe some people suspected. On average we can assume he used 3 LBs 1/4th of the time and 2 LBs 3/4th of the time.

We also see within groups BB has not only devalued DL compared to other teams but DTs in particular. This may have been in part due to his roster. Anyway I just figured since I looked this info up I may as well post it and you can decide how useful or useless it is.
It really would be helpful if the data were available by down and distance. Using the average doesn’t tell the complete story.
For example one snap of 3-1-7 then one of 3-3-5 would look like we played 3-2-6 all the time.

Also last year we changed schemes from game to game especially early in the season, so again taking the average doesn’t really tell the story.
 
Defensive Tackle, Middle Linebacker (and LB in general) & Strong Safety, once considered the backbone of a defense, are now considered the least important positions of a defense, and Bill's team-building philosophy appears to reflect the change in emphasis:
No 0/1-tech DT was drafted for the 3rd straight year;
No LB of Any kind was drafted (although 2 were drafted last year, strangely enough);
and No SS was drafted (in fact, NO Safety of Any consequence has been drafted since 2013),
even when there were Plenty of opportunities to do so for all 3 positions.
 
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