Efficiency statistics with possessions as denominator are pretty much standard practice in basketball, but, interestingly enough, don't seem to be widely considered in football circles. To come up with my own QB-centric offensive efficiency stat, I looked at total points scored by the offense (when a particular QB was playing) in relation to drives where they were trying to score (this excludes drives to kill clock at the ends of halves, for example). Here are Mac's stats thus far this season. Bear in mind that the adjusted column at the far right excludes drives where a teammate turned over the ball (e.g., Harris' fumble late in the Miami game).
Mac Jones 2021
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What surprised me was how favorably Mac's stats compared to Cam in 2020, Brady in 2019 and Brady in 2018.
Cam Newton 2020
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Tom Brady 2019
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Tom Brady 2018
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It's still early, and there's a reasonable chance that Mac hits the rookie wall in a few weeks, but, so far, the results have been very encouraging.
For reference, here are some other comps.
Tom Brady 2009 (coming back from an injury year)
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Tom Brady 2020 (with the Bucs last year)
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Justin Herbert 2020 (rookie year)
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Dak Prescott 2016 (rookie year)
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