Online home of Jeremy Scheff

The Bishop Sankey Diagram

Or, my best pun ever:

Did Adrian Peterson actually rush for more yards than Eric Dickerson but have it go unnoticed due to measurement error?

Despite miraculously recovering from ACL surgery and successfully leading his team for the playoffs, Adrian Peterson tragically missed the all time rushing record by 9 yards.

...or did he?

Let's think about how the NFL measures yardage. They take the difference between where the ball was before the play and where the ball is after the play, and then they round to the nearest integer. What happens if you rush for half a yard? It'll get recorded as either 0 yards or 1 yard. Spread out over an entire season, and this kind of rounding error can have a big impact.