Stats Prove MLB Umpires Call 99.5 Percent of Plays Correctly
Josh Donaldson calls ump 'top 3 worst' despite 99% accuracy
Grading MLB umpires: Meet the humans behind the Twitter bots that track balls and strikes - The Athletic
Instant replay in Major League Baseball - Wikipedia
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Josh Donaldson calls ump 'top 3 worst' despite 99% accuracy
Stats Prove MLB Umpires Call 99.5 Percent of Plays Correctly, News, Scores, Highlights, Stats, and Rumors
The Effect of Umpires on Baseball: Umpire Runs Created (uRC)
An analysis of nearly 4 million pitches shows just how many mistakes umpires make
After rough Wild Card Series ball/strike calls, higher-rated umpires up for Division Series games
MLB umpires missed 34,294 ball-strike calls in 2018, study shows
On average, how many calls do umpires get wrong in a game? - Quora
MLB Umpires Missed 34,294 Pitch Calls in 2018. Time for Robo-umps?, BU Today
