MLB News: Umpires To Wear Microphones During On-Field Reviews

Iowa native and longtime MLB umpire Don Denkinger dies

Dodgers news: MLB's first umpire announcement for replay reviews - True Blue LA

Baseball news: MLB, Plate umpire Ron Kulpa hit, White Sox, Red Sox

As Giants, A's open Cactus League play, how MLB's pitch timer works

Padres manager Bob Melvin's ejection heard on umpire's hot mic

How MLB Umpires Learned to Explain Replays to Crowds - The New York Times

MLB attempting to remove viral Mets, umpire video from internet

Hoornstra: New MLB rules change the sights, sounds of the game – Orange County Register

Will MLB use the mic'd up pitcher and catcher in the regular season? - AS USA

MLB umpires will tell fans the results of replay reviews starting this year - Bleed Cubbie Blue

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