MLB umpires to make announcements on replay reviews for first time
MLB's Replay System Is Now A Huge Money-Maker For The Owners
MLB doubles camera angles for video reviews of umpires
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MLB may give microphones to umpires to explain replays
MLB-Zoom partnership to give umpires, fans new look at replay
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MLB Umpires to Use On-Field Microphones to Announce Replay Review
Mic'd up MLB umpires might announce replay rulings
MLB umpires to announce replay review decisions to fans - ESPN