Here’s how PFF works, the company grades each player on every play from a scale of negative two to two in 0.5 increments. Here’s how the company defines the benefits of their grading system.
“Taking every play into consideration allows for a larger sample size of data to tell the proper story rather than just a highlight reel of plays that we tend to remember, for better or worse. We also work to eliminate bias by not caring about the level of player who is being graded, so whether it’s the best tackle in the league missing a block or one of the worst, the same grade is given. Preconceived level of ability has no impact on the grading system. This style has worked well in unlocking undervalued gems through the years, while also not being swayed by player hype if it is undeserved.”
Each game players are graded on a scale from 1-100. 90-100 represents an elite grade, 85-89 represents an all-conference player, 70-84 is starter quality, 60-69 is backup quality and everything under 60 is replaceable.
https://dfshub.com/pro-football-focus-pff-player-grades/
