Stunning study shows MLB umps got 34K calls wrong in 2018

If you’re a proponent of robot umps taking over at the MLB level, then a new study put together by graduate students at Boston University will strengthen your stance.

The information garnered by this study, which evaluated nearly four million pitches over the span of the last 11 MLB seasons, is stunning.

“In 2018, MLB umpires, made 34,294 incorrect ball and strike calls for an average of 14 per game or 1.6 per inning,” per the study. “Many umpires well exceeded this number. Some of these flubbed calls were game changing.”

Per Mark T. Williams, writing on, the data was “collected by MLB-owned Statcast and Pitch f/x, was sorted, formatted and superimposed on a standard strike zone map.”

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