Retired NFL star JJ Watt rips PFF's popular grading style: 'The system is terrible'

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The grades from sports analytics company Pro Football Focus have become a popular way to evaluate the performances of NFL and college football players' performances over the past decade.

According to the company's website, the grading system evaluates every player on each play of a given football game. Players are then graded on a scale of -2 to +2. Analysts then undergo training to learn how to grade plays. Therefore, PFF's grades do include elements of subjectivity.

The assigned grades have also faced scrutiny at times, with some even questioning how seriously teams and fans should weigh the results. Retired NFL pass rusher J.J. Watt was recently vocal about his disdain for the grading system.

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J.J. Watt #99 of the Arizona Cardinals looks on during player introduction prior to the start of the game against the San Francisco 49ers at Levis Stadium on January 08, 2023 in Santa Clara, California.  (Thearon W. Henderson/Getty Images)

NBC commentator Cris Collinsworth is a PFF co-founder and often cites the company's grades during "Sunday Night Football" broadcasts. PFF's numbers have increasingly become viewed as the top source for player evaluation.

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On Tuesday, Watt pushed back against PFF's grade for Texans rookie star quarterback CJ Stroud following his performance in Houston's win in the wild-card round over the Cleveland Browns.

Stroud finished the game with 284 passing yards, three touchdowns and no interceptions and became the youngest quarterback in modern NFL history to win a