The mystery deepens …

I’ve looked at pfx_x and pfx_z movement on a day-by-day basis to see if there are other days with the same issue.  And, yes there are; here are the plots for the games from June 26 to June 30:

The game_id 201306282 is the second game of a doubleheader between Cleveland and the WhiteSox and so I looked up the starters to see if their pitches of this day were different from the rest of their starts.

Here are Jose Quintana’s plots for 2013:

And here are Carlos Carrasco’s plots for 2013:

So, both pitchers had the same change in overall pitch movement on the same day.  This just can’t be right.

Explorations continue …


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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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