PFF works with all 32 NFL teams providing customized data to them. So, PFF is actually relevant for NFL decision makers. I know many find this shocking b/c they have done zero research when forming an opinion.
I just enjoy the discussions. The grades are flawed at several positions where playmakers are not rewarded enough. . Diggs is a great example. He had 11 INTs last year......... but also gave up more yards than any CB since they started keeping track of such things around 20 years ago. His style of play was high risk/reward. Traditionally, CBs are judged almost exclusively on INTs. So, Diggs was the first team all-pro while being one of their worst rated CBs. So, obviously, there is a huge discrepancy between how they grade and how he is perceived in the NFL. ...... The reason is obvious. The INT is just one play among 60-70 snaps that Diggs plays every game. They don't have a way of adequately weighting the "big play". So, what are we looking at you might wonder........ you are looking at consistency at CB.
Here are PFF top 5 CBs this season.
1. jack jones NE
2. Patrick Surtain jr Denver
3. jalen Ramsey LAR
4. Isaih Rodgers Ind
5. Sauce Gardner. NYJ
Pretty solid list, but Diggs is only 21st. He's still making plays but also giving up more than these guys. I think thats interesting.
People that defend them are probably working as a grader for them.
Team don't use their player grades..
Teams use stats that require watching game footage to determine.
Example: QB number of targets per area of the field (right, left, middle and short/long).
Belichick blurted out in a press conference that PFF players grades are a joke (His response to a question).
The sum of weekly grades gets changed at the end of the season because they don't want to have a terrible season ending grade on players that made All-Pro.
The qualifications to be a "film grader" are zero. In the past I posted a copy of their job reqs here. I also posted a resume of a person that had worked for them as a "film grader".
The logistics of it are problematic.
32 teams per week.
Approximately 150 total snaps.
11 players per team per snap.
That is 52,800 player snaps.
As in 52 thousand...
Grades published within 24 hours.
At 1 minute per snap it would be 880 hours per week.
In order to get the grades out in 24 hours they would need at least 100 people grading but more likely 200.
Getting consistent grading from over 100 different people is basically impossible.
If they were attempting to generate accurate grades they would grade each player snap with multiple graders. That would require hundreds of graders each week.
Coaches will tell you that you must know player assignments within the scheme in order to grade players.