MLB news: Umpires to use microphones to announce replay decisions
MLB umpires to announce replay review decisions to fans - ESPN
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Umpires might get microphones to explain video reviews, and
MLB umpires will make in-ballpark announcements to explain replay
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Stats Prove MLB Umpires Call 99.5 Percent of Plays Correctly
MLB umpires to make announcements on replay reviews for first time
MLB Umpires Might Get Microphones To Explain Replay Reviews
Ump caught slipping on the hot mic 😂 @MLB
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Umps to begin in-park replay announcements, but COVID-19 may delay