STARTERS: Integrating barrel rate

This is the third in a series of articles that will help you incorporate Statcast metrics into the toolbox we use at BaseballHQ.com.

We first looked at the correlation between average exit velocity and the stats and skills we use in our toolbox at BaseballHQ.com. We did this for both hitters and pitchers.

Next, let's look at the barrel rate (barrel%) allowed by starting pitchers.

Our method will be to identify metrics that have at least a moderate correlation (r 0.30) to barrel rate.
 

Summary

Barrel rate is calculated as barrels/batted balls. It's a function of exit velocity and launch angle, as shown in this image courtesy of the MLB Statcast glossary:

There are four metrics in our toolbox that have at least a moderate correlation...

Almost!

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