MLB's new instant replay review process proves to be lengthy – New York Daily News
Umpire (baseball) - Wikipedia
Umpires might get microphones to explain video reviews, and nothing can possiblie go wrong
Breakthrough for MLB fans, umpires will announce replay reviews
Mic'd up MLB umpires might announce replay rulings
Beyond the grunt: Umpires mic up, and baseball changes a bit
Baseball instant replay: New system, new strategies – The Mercury News
Instant replay system used for first time during Rays game
At last, MLB umpires will communicate with fans about replay reviews - Bleed Cubbie Blue
MLB in innovative replay review-focused Zoom partnership - Sportcal
Beyond the grunt: Umpires mic up, and baseball changes a bit
Austin Hedges blasts New York replay crew: 'It cost the game
Baseball Replay Works—And It's Terrible
MLB Umps Are Getting More New Rules Wrong, Says Yanks Coach - InsideHook