When I look at that chart, I really want to turn it into a ‘drive length per play’ average by subtracting the drive start from each snap position, taking a new average, and multiplying by two. In theory, that should be a pretty good indicator of offensive performance.

Of course, it’s a bit of a chore to do that when you can just take the square root of the average of the squares of the drive lengths, which should (mostly) be very close.

Ah right. I misunderstood how it was calculated.