...interesting read, although a bit complex.
According to FiveThirtyEight:
"Yet its biggest shortcoming might be the way it is unmoored from changes in the game itself. Passing has never been more efficient than it was this season, in which the league’s average QB posted a rating of 92.9. That is remarkably high considering that a quarterback who posted a rating of 92.9 would have led all qualified passers in 15 separate seasons from 1950 through 1986. Clearly, the scale needs recalibrating."
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