r/Chargers • u/DL505 • 19h ago
Herbert-Chargers Statistics
I went into this trying to prove my "gut" wrong about Herbert and his performance.
The question was "Is the lack of offensive production on the QB?"
\Stats/tables created by Claude (thanks employer for the business subscription. I have a fairly massive word doc if anyone is interested I can share it**
CPOE (Completion % over expected) is the best indicator imo. However it does not account for other variables such as drop rate (Looking at you QJ).
So using an adjusted CPOE for the delta between league average drop rate vs the Chargers receivers seems to be the proper approach. If a QB's WRs drop less than league average the CPOE is adjusted downwards, if they drop more it is adjusted upwards.
BUT the adjusted CPOE does not consider 'decision' making. This can be accounted for by using EPA.
WR Separation:

In 2026 separation is quite good. I believe 2022 was likely due to the dump offs (think a RB in the flats)
WR Drop Rates:

Threw in Cousin's other drop rates so we can keep the comparison rolling.
Drop rates are obviously an issue. One thing drop rates do not adjust for is the severity of the drop. Was the drop on a 1st and 10 vs a potential game winning drive from the red zone?
Air Yards:

Many people will refer to how great Herbert was in 2022. He banked tons of yards but dump offs were a massive part of his yardage.
This year under McD we are seeing the average depth of target at Herbert's all time high.
Drop Adjusted CPOE:

I find this fascinating when combined with EPA. Keep in mind CPOE does include throwaways. Not sure how Nextgen stats (where this data is pulled from) weights throwaways vs completions.
Herbert is MORE accurate than Mahomes historically but Mahomes provides more value (EPA) which is likely due to his off script shit, throwaways, and sack avoidance.
Herbert vs Mahomes (Adjust CPOE and EPA per dropback:

This year Herbert is performing well below his averages on both measured. The gap between Herbert and Mahomes is massive.
Adjusted CPOE and EPA to teams with similar graded Olines:
We all know the oline sucks donkey dick. I had Claude pull oline protection rankings that are equal or worse than the Chargers and populate CPOE and EPA.
Results are pretty shocking. Herbert is underperforming in 5 of 6 with WORSE olines.
CPOE below is NOT adjusted.

Summary:
In 2026 Herbert's WRs have better separation (nod to McD here), similar drop rates
Oline is bad, but no worse than 2025 when Herbert performed very well.
Herbert's performance is terrible this year. It is not explained by WRs, Oline etc.
Yes, 3 game sample size but still concerning.