May 19, 2019

# Geek Speak – Yards Per Play (YPP) vs. Total Yards

Much as I did with the total yard metric, I plotted the yard per play (YPP) for the 2,116 FBS vs FBS games for the last three years.

Not surprisingly, the curves and results are nearly the same. In fact, the YPP metric has a slight edge – 79.0% to 77.7%.

However, two things stand out to me:

1. With the exception of the last range, in which both are at 100%, the total yard metric has a higher percentage than the YPP metric in each range. How then does the YPP metric have a higher overall percentage? There are many more (328 to 169) games over the last three ranges in the YPP metric thereby weighting those ranges much heavier.
2. While the ranges go progressively higher without exception in the total yards metric, it actually goes lower (slightly) from the 3-3.49 range to the 3.50-3.99 range. The sample size is small, only an average of 26 games per year fit in this range, so it’s likely to be an anomaly and will work itself out over time.

There’s not a lot of difference in these metrics in my mind and that was part of my point in the total yard post. YPP is a simple and easy calculation, but you could easily use a metric that doesn’t even require a calculation (total yards) and get similar results.

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