Link
This is a fairly long and detailed article showing there are ample opportunities for MLB to improve its product. Although the article doesn't emphasize existing improvements, the data does show umps are getting better, but several additional improvements should be considered. I would love it if we could get access to similar data for ACC officials in football, basketball, and baseball.Quote:
This article is based on 11 seasons of Major League Baseball data, almost 4 million pitches culled and analyzed over two months by Boston University master lecturer Mark T. Williams and a team of graduate students at the Questrom School of Business experienced in data mining, analytics, and statistics.
This deep-dive analysis demonstrated that MLB umpires make certain incorrect calls at least 20 percent of the time or one in every five calls. Research results revealed clear two-strike bias and pronounced strike zone blind spots. Less-experienced younger umpires in their prime routinely outperformed veterans, and umpires selected in recent World Series were not the best performers. Results showed a declining but still unacceptably high BCR score, but on a positive note, only a marginal inter-inning call inconsistency. Findings also identified new and rising star umpires and highlighted the pressing need to recruit higher performers.