Well, this is odd …

I’ve reloaded data from MLB for the last four years to include pitchf/x and hit data.  In learning how to use ggplot2, I’ve come across something perplexing.

Looking at the pitchf/x data for Justin Verlander over the years 2013-2016, there appears to be three games in 2013 where the PFX_X and PFX_Z data are scaled differently.  These three games are from 20130425, 20130709, and 20130907 and can be seen in the center of the bottom half of the 2013 plot.

It’s not a plotting issue … the pitchf/x data for those pitches is different.  Anybody else seen this?  More to follow as I try to figure out what is going on …




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Long-time resident of London, Ontario - with an all-too-short diversion to Quebec City. Married to my best friend for 38 years and counting, proud father of the five nicest kids on the face of the planet, and father-in-law to a pretty nice young fellow as well.

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