barackdhouse
Footballguy
It is a data conversion not an extrapolation. We can take a player's 40 time at the combine and convert it to MPH, though it will be low because of the starting gun. If we timed say the last 20 yards of their 40 then that would be a fair estimate of their top speed (without pads and within the combine) and would be similar to the Next Gen calculation.Nick Chubb had the fastest run, per MPH, in all of football last year. That's why it's worthless. You pick the fastest split second of a 50 yard run and extrapolate over an hour.
He doesn't win with speed. He's a 4.55+ guy.
But when these numbers are reported in MPH it is just a conversion, like going from 32F to 0C.