Yesterday, it was discovered that the pass blocking and drops by pass catchers went from really good to about average.

The hypothesis, then, is that the quarterback was largely responsible for the Bears having one of the worst passing games – and thus worst offenses – in the NFL. So today I want to look at Mitchell Trubisky’s performance more closely to see what it can tell us.

On the surface, Trubisky certainly was awful in 2019. He completed 63.2% of his passes (18th in the NFL), averaged 6.1 yards/attempt (last), and posted a passer rating of 83.0 (28th). This was a big step back from 2019, when he was near average in all of those marks (66.6% completion, 14th; 7.4 yards/attempt, 18th; 95.4 rating, 16th).

Evaluating a quarterback’s play statistically can be tricky, because his stats depend both on his offensive line’s ability to block for him and his RBs/WRs/TEs’ ability to catch his passes, both of which are outside of his control. That’s why I started by looking at the offensive line and drops, both of which were worse in 2019 than 2018 but not nearly bad enough to explain bottom 5 production from the quarterback.

It’s also worth noting that Chase Daniel’s production barely changed between seasons. In 2018, he completed 70% of his passes, averaged 6.8 yards/attempt, threw 3 TD and 2 INT, and posted a 90.6 passer rating. In 2019, he completed 70% of his passes, averaged 6.8 yards/attempt, threw 3 TD and 2 INT, and posted a 91.6 passer rating. To be fair, it’s a small sample size – he played 2 games and threw around 70 passes each year – but still, this is at least anecdotal evidence to support the notion that the offense as a whole didn’t change all that drastically.

Advanced Stats

With that said, let’s look more closely at Trubisky’s performance to see if we can hone in on what changed, besides worse pocket presence and less running impact, which were touched on in previous articles. This is going to focus on passing. We’ll start by looking at a smattering of advanced statistics, which come from a combination of Next Gen Stats and Pro Football Reference.

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It stands to reason that if the offense was mainly responsible for the Bears’ 2019 regression, and the running game didn’t change all that much, most of the regression came from the passing game. And a quick look at the stats backs that up. In 2018, the Bears were 9th in completion percentage, 18th in yards/attempt, 14th in passer rating, and 10th in sack percentage. In 2019, those ranks fell to 14th, 32nd, 24th, and 23rd.

So what went wrong in the passing game? Generally, there are 3 components to examine: the pass protection, the pass catchers, and the quarterback. Let’s look at each one by one.

Pass Protection

Evaluating pass protection statistically is difficult, but thankfully advanced statistics to help with this are getting better. A number of them are shown below, with their ranks out of 32 NFL teams in parentheses. Average time to throw is from Next Gen Stats, Average time to pressure and pressure rate is from Pro Football Reference, and Pass Block Win Rate – a measure of how often a QB has a clean pocket for at least 2.5 seconds, is from ESPN Metrics (source for 2018 and 2019).

As I tried to make sense of these numbers, it seemed to me that the change in NFL ranks was often greater than the change in the actual value. Sure enough, it seems that pass blocking was slightly better across the league in 2019 than 2018. The median average time to pressure increased from 2.4 to 2.5 seconds, the median pressure rate dropped from 24.1% to 22.6%, and the median pass block win rate increased from 50% to 59%.

Looking just at the Bears’ numbers, they generally got a little worse in pass protection, but their drop in the rankings looks worse than it is because the rest of the NFL got better. The average time to throw didn’t change all that much and the pressure got there a little faster, but the Bears still ranked right around average both in pressure rate and pass block win rate.

If the pass protection didn’t get much worse, how do we account for the massive uptick in sacks? The Bears went from giving up 33 sacks in 2018 (6.1% of dropbacks) to 45 in 2018 (7.2% of dropbacks).

Well, sacks aren’t only due to the pass blocking, they’re a result of the quarterback as well. Lester Wiltfong of Windy City Gridiron breaks down film on every sack and assigns blame to the person or people he deems responsible (he also splits blame if multiple people mess up).

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Yesterday I dove into Chicago’s 2019 ground game to figure out where it all went wrong. There I found that the Bears missed Mitchell Trubisky’s legs, didn’t change how they used their 2 main running backs much, and saw the largest regression on runs outside of the tackles.

Today, I want to look a little more closely at directional running.

Let’s start by looking at yards per carry, which can be seen in the figure below. Bar height is proportional to yards per carry (ypc), numbers in parentheses are NFL rank out of 32 teams, and bars are color coded according to that. Green = top 10, red = bottom 10, yellow = middle 12.

A few thoughts:

• I don’t think it’s a coincidence that the red all comes on the right side and the Bears had injury issues at right guard and right tackle this year. The yards/carry actually improved behind left tackle and left guard compared to 2018.
• The numbers look even better up the middle and behind left guard when you look at runs after the Bears swapped Cody Whitehair and James Daniels back to their 2018 spots. After that, the Bears averaged a combined 4.7 yards/carry on runs to those areas.
• Runs outside the tackles were fairly poor on both sides, which is new since 2018. I think this speaks more to the blocking of WRs and TEs than the offensive line. The Bears got fewer fewer snaps from Trey Burton, Josh Bellamy, Kevin White, and Taylor Gabriel in 2019, and it appears the young players who took those snaps may have struggled in run blocking.

Now I want to look at this from another perspective using success rate, which can generally be thought of as a measure of staying ahead of the chains. A run is considered successful if it:

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Chicago’s rushing attack was woeful in 2019, finishing 27th in the NFL in rushing yards (91 yards/game), 29th in yards per attempt (3.7 yards/carry), and 26th in success rate on rushing attempts (44%). All three marks showed a decrease from 2018, when they were 11th (121 yards/game), 27th (4.1 yards/carry), and 10th (48%) in those three metrics.

This happened despite having fairly decent consistency in personnel. The starting offensive line was the same (when healthy), and the Bears saw only three primary rushers in both seasons. Tarik Cohen and Mitchell Trubisky were 2 of the 3, with the main rusher changing from Jordan Howard in 2018 to David Montgomery in 2019.

Today I want to look at the running game from a variety of angles to try and figure out what changed to account for the dip in production.

Player vs. Player Comparison

Let’s start out by comparing each player from season-to-season. First, I’ll look at the players who accounted for the majority of rushing attempts each year: Jordan Howard and David Montgomery. Their usage and production was remarkably similar in the two seasons, as you can see in the table below.

Similar playing time, similar carries, similar efficiency. The two were basically indistinguishable from each other, at least on the surface. That really makes you question whether it was worth getting rid of Howard and trading up for Montgomery in the 3rd round last year. At least for 2019, the answer is a resounding no.

This post is focused on rushing, but look at those bottom two rows. One of the reasons to swap Howard out for Montgomery was supposed to be that Montgomery can feature more heavily in the passing game, and thus make the offense less predictable and harder to defend. That didn’t happen in 2019. One of Chicago’s big problems in 2018 was that they were too predictable based on personnel (Tarik Cohen = pass, Jordan Howard = run, Anthony Miller = pass, etc.). In 2019, the offense ran the ball 50% of the time when Montgomery was on the field and only 24% of the time when he wasn’t. For Cohen, those numbers were 25% and 52%. That’s too big of a swing in tendencies based on personnel.

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Chicago scored only 17.5 points per game in 2018, the 4th worst mark in the NFL. This was a significant drop from 2018, when they were 9th best in the NFL at 26.3 points per game. I’ve seen some people argue that this is mainly due to Chicago’s defense, which scored 5 fewer touchdowns and forced 17 fewer turnovers in 2019. The logic then was that the offense in 2018 was just as bad, but it was overshadowed by a dominant defense that handed them points on a regular basis.

This argument made me curious, so I dug into the numbers to see if it held up.

Non-Offensive Points

The 2018 Bears had 44 points that were scored by their defense and special teams, while the 2019 version had 16*. If you remove those from the season totals, the 2018 offense scored 277 points (23.6 per game) while the 2019 version scored 264 (16.5 per game).

That means Chicago’s offense scored 7.1 points per game more in 2018 than 2019. The total points scored dropped by 8.8 per game, so clearly the bulk of that was from offensive points, not defense/special teams.

*Quick disclaimer: I tallied touchdowns, field goals and safeties, and applied values of 7, 3, and 2, respectively, for each. These numbers might be a little off because not all touchdowns result in exactly 7 points due to missed extra points or going for 2.

Points Off Turnovers

Of course, points directly scored by the defense is only half of the original argument. The 2018 defense also forced far more turnovers, in theory setting the offense up in better field position for more easy points. In order to see what effect this had, I looked at points scored off turnovers for each team using Pro Football Reference’s Drive Finder. The table below shows the data.

Despite forcing far more turnovers, the Bears didn’t actually get many more points from them. Part of this may because of where the turnovers happened; the average starting field position for these drives was the Chicago 42 in 2018 and the opponent 47 in 2019. Accordingly, the Bears got 2.4 points per drive off turnovers in 2018 and 3.3 in 2019. Because of this, offensive scoring following a defensive turnover changed by only 0.7 points per game from 2018 to 2019.

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The 2018 Chicago Bears went 12-4 and outscored their opponents by 138 points, the 4th best mark in the NFL. Expectations for the team were sky high heading into 2019, but Chicago responded by falling flat. They finished 8-8 and were actually outscored by 18 points over the course of the season.

So what changed from 2018 to cause such significant regression? That’s exactly what I’ll be looking at over the first part of the off-season to see what areas the Bears need to prioritize improving for 2020. Let’s start today with a general overview of all three phases.

Offense

Chicago’s offense was not great in 2018, but it took a decided turn for the worse pretty much across the board in 2019, as you can see in the table below. DVOA is a metric from Football Outsiders intended to be an all-encompassing measure of how well a unit performs. Values in parentheses are NFL rank out of 32 teams.

A few thoughts:

• The 2018 offense could generally be described as average to slightly below average. The 2019 version was one of the 4-5 worst in the NFL.
• The run game actually didn’t change all that much, remaining fairly consistently bad in both years. This is probably why the Bears shook up their offensive coaching staff this off-season. I’ll have a more detailed look at what did and did not change in the run game in the next few weeks.
• The passing offense went from average to possibly the worst in the NFL. Some – but certainly not all – of this can be attributed to a decrease in pass protection, though notice the pressure rate allowed was still average, making pass blocking one of the strongest areas of the offense. I’ll take a much closer look at the passing game in the near future.
• Pretty much the only area where the Bears actually improved was that they turned the ball over less. This is why their DVOA – which heavily weights turnovers – didn’t fall as far as most of the other statistics suggest it should have.

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A disappointing 2019 season is over, and it’s time to start thinking about what the Bears can do over the next several months to set up a 2020 rebound. To start the offseason, let’s take a look at where things currently stand for the roster.

Salary Cap Situation

The 2020 salary cap has been projected between $196.8M and $201.2M. We’ll play it safe and use the low end of that estimate. As you can see in the table below, the Bears don’t currently have a lot of money to work with (bottom row). All cap information courtesy of Spotrac.

So the Bears currently have around $13.5M in cap room for 2020, though that could be around $18.5M if the cap hits more optimistic projections. Now let’s look at who they lose from 2019.

NOTE: these numbers are before the Eddie Jackson extension. I’ll update once the exact figures for that come out, and then remove this note. I’m guessing they’ll only drop the 2020 space by 1/5 of his signing bonus, which will probably come out to $2-3M.

Key Free Agents

The Bears actually don’t have a huge number of free agents this year, at least in terms of players who were significant contributors. I’ll briefly list and discuss the main ones here, sorted by position.

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The Bears didn’t wait long to start attacking the offseason following a disappointing 2019. Just three days after their last game and one day after firing offensive line coach Harry Hiestand, they hired his replacement in Juan Castillo. He brings a wealth of experience to the role, having filled the same position in Philadelphia under Andy Reid from 1998-2010, in Baltimore from 2013-16, and in Buffalo from 2017-18.

Castillo is expected to be heavily involved in designing and coordinating the run game in Chicago, which will be revamped this offseason after 2 unproductive years under Hiestand and former offensive coordinator Mark Helfrich. Accordingly, I dug into how well run games have fared under Castillo in the 19 years he’s served as an offensive line coach and/or run game coordinator. I did this using DVOA rankings, from Football Outsiders, which are a generally solid all-encompassing metric to evaluate both the rushing and passing production from an offense. The ranks for rushing and passing DVOA can be seen in the table below.

There’s a lot of data to parse through here, and I think you can look at it fairly from both an optimistic and pessimistic viewpoint. Let’s take a brief look at each perspective:

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The George Inn. My favorite pub in London.

Why Do I Like the Chicago Bears This Week?

I always like the Chicago Bears.

And they are not losing in London, with Reverend Dave and I in the building, all hopped up on bitter ale.

Trite, Boring Thoughts on the Raiders (Stolen From Data’s Twitter)

Data had a stream of Tweets early in the week but I fear they were lost in the Monday excitement. He is one of the best follows on Bears Twitter and I recommend you give him a follow. Here are his thoughts:

• Derek Carr has been sacked only 8x in 4 games this year. 4th fastest time to throw of any NFL QB, 4th shortest average throw. This feels like a game where the Bears need Roquan Smith, not Nick Kwiatkoski. Gonna be a lot of underneath stuff in coverage.
• In the running game, Oakland runs inside a little more than outside, so in that regard Kwit would fit right in plugging the interior run. When they do run outside, the Raiders heavily favor the right by a 2:1 ratio.
• 2 of Oakland’s 3 most targeted players have among the 15 shortest average target distances among all NFL WRs and TEs. Waller is 4th shortest TE at 4.9 yards/target, and Renfrow 3rd shortest WR at 6.4 yards/target. Together they account for about 45% of all Carr targets in 2019.
• Looking now to Oakland’s defense, this is a game the Bears should find success through the air. Raiders giving up 8.1 yards/attempt (23rd), with 9 TD and only 1 INT for a passer rating of 106.8 (25th).
• Some of that is because Mahomes lit them up, but Flacco and Cousins both posted a passer rating >100 against them, and Brissett threw for 3 TDs. Their pass D is bad, in no small part because they can’t rush the passer (only 5 sacks through 4 games).
• Oakland’s run D is actually pretty solid, coming in at 16th in rush yards/game and 11th in yards/carry.
  • Editor’s Note: Dalvin Cook rushed for 110 on only 16 carries against them.

Tweet of the Week (kinda)

I found this story incredibly moving.

Thirteen children of firefighters who died at the World Trade Center on September 11, 2001, and six whose fathers died of 9/11-related illnesses, graduated from the city’s fire department during an emotional ceremony. https://t.co/cG5uJtbt4d

— CNN (@CNN) September 25, 2019

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It’s been a long offseason, and I’ve covered a lot of ground with a variety of articles. Now that the 2019 season is fast approaching, I’m pretty much finished writing new content, but since I have a hard time remembering everything I’ve researched and shared on here, I thought it might be helpful to re-visit what we learned and see how it relates to the Bears in 2019.

I’m going to try and highlight the most relevant stuff in 1 sentence per article, grouped together by topic. Think of it like a TL;DR for the offseason.

Trubisky

• Trubisky’s playing approach shifted as the season went along, but his overall performance in year 2 puts him in good historical company.
• Trubisky was really good on short stuff in 2018, but really bad throwing the long ball. Also an accompanying film study by Andrew Link.
• Speaking of being bad at the deep ball, nearly half of Trubisky’s 2018 interceptions came from missing open receivers on deep throws.
• These misses also accounted for a number of interceptions against zone defense, but otherwise Trubisky was really good against zone in 2018. Plus, the Bears were too reliant on curls and go routes.
• The good news is that history suggests Trubisky will likely throw the deep ball better in 2019 than he did in 2018. Also an accompanying film study by Andrew Link.
• One area of concern for Trubisky is that he really struggled against average or better defenses in 2018.

Running Backs

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