Umpires may soon wear microphones to explain replay rulings - NBC Sports
Beyond the grunt: Umpires mic up, and baseball changes a bit
MLB umpires will wear mics to explain review rulings to fans starting this season
MLB Umpire Microphones in Action as 2022 Season Nears - Crew Chief Ted Barrett's PA Announcements
Report: MLB umps will use mics to relay results of reviews in 2020
How Zoom will help MLB umpires make replay calls in 2023 season
Video: Umpire, Terry Collins mic'd up during wild 2016 argument - Sports Illustrated
MLB Umpires to Use On-Field Microphones to Announce Replay Review Decisions to Fans, News, Scores, Highlights, Stats, and Rumors
Dan Bellino, MLB umpire who ejected Madison Bumgarner, apologizes for behavior