MLB umpires to use microphones to announce replay review decisions
One change you might see at a Reds game this season
MLB umpires to announce replay review decisions to fans - ESPN
Report: MLB umps will use mics to relay results of reviews in 2020
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MLB umpires to announce replay reviews to fans
There's more than one way to the World Series. Ask Carlos Torres and Mike Hill.
MLB umpires will start announcing replay review decisions to ballpark crowds
At last, MLB umpires will communicate with fans about replay reviews - Bleed Cubbie Blue