HOW IT WORKS:
Pro Football Focus, which nearly a third of the NFL subscribes to, has a complex grading process, looking at every player on every offensive, defensive and special-teams play. Plus or minus grades are given and are based around an average of 0, with each position graded slightly differently. If a player does something you normally would expect, then a score of 0 is given. Grades are given for plays that are reasonably considered to be better or worse than the average or expected play. For the final grade, player participation is factored in, using a normalization factor to set the average player in that facet of the game to 0.
A rough season continues to get rougher for Bears defensive end Julius Peppers. According to PFF’s ratings, Peppers had his worst game of the season Thursday night against the Giants.
Compiled with Adam Jahns