PFF stands for Pro Football Focus, which is a company that grades every NFL player on every play on a scale of -2 to +2 using half-point increments. The grades are based on context and performance, and they are not a measure of talent but rather strictly performance on the field. PFF grades are a qualitative ranking that measures performance in ways that traditional stats like yards after catch or QB rating cannot. The grading process evaluates players objectively, regardless of perceived ability, and it measures “performance relative to expectation” instead of just traits or measurable factors. PFF collects over 135 fields of data and normalizes the grades accordingly to determine the baseline expectation for each player on every play. PFF grades can be used to rank players and teams, and they help quantify skill so you can compare one player or team to another. PFF grades are a unique look at a player’s production, and when paired with PFF’s advanced data, it’s one of the most powerful tools in the game.