Each week during the season, we will take a look at how PFF College graded Ohio State's individual players in that week's game. PFF College assigns grades to every player that sees the field, but for the sake of more accuracy, we will only go through the grades of players who were on the field for at least ten offensive or defensive snaps.
Before we get into the grades from this week's 45-31 win over Minnesota, here's a quick explanation of how the grades are assigned.
The process: The PFF grading system evaluates every player on every play during a football game. We believe that #EveryPlayCounts and that attention to detail provides insights and data that cannot be found anywhere else. The grading system was founded on the principle of grading “production” rather than traits or measurables, but perhaps a better way to describe it is a player’s “contribution to production” on a given play.
Did the quarterback make a great throw, but it was dropped? The quarterback contributed to positive production and will receive a positive grade for that effort, even though the receiver let him down, earning a negative grade along the way.
The benefits of this style of grading are numerous. 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.
The grading scale: Each player is given a grade of -2 to +2 in 0.5 increments on a given play with 0 generally being the average or “expected” grade. There are a few exceptions as each position group has different rules, but those are the basics. The zero grade is important as most plays feature many players doing their job at a reasonable, or expected, level, so not every player on every play needs to earn a positive or a negative.
At one end of the scale you have a catastrophic game-ending interception or pick-six from a quarterback, and at the other a perfect deep bomb into a tight window in a critical game situation.
Each position has its own grading rubric so our analysts know how to put a grade on the various expectations for a quarterback on a 10-yard pass beyond the sticks or what the range of grades might look like for a frontside offensive tackle down blocking on a “power” play.
There is then an adjustment made to the “raw” grades to adjust for what the player is “expected” to earn given his situation on the field. For instance, a player’s grade may be adjusted down slightly if he plays in a situation that is historically more favorable while a player in more unfavorable circumstances may get an adjustment the other way. We collect over 200 fields of data on each play, and that data helps to determine what the baseline, or expectation, is for each player on every play.
Each grade goes into a specific “facet” of play in order to properly assess each player’s skillset. The facets include passing, rushing, receiving, pass blocking, run blocking, pass-rushing, run defense and coverage. Special teamers also have their own facets of kicking, punting, returning and general special teams play. Facets are important in order to have a clear view of where a player’s strengths and weaknesses lie.
You can read more about PFF's grading and what it means here.
