Umpires may soon wear microphones to explain replays
Major League Baseball considers dramatic change with robot umpires - CBS News
Why is MLB still using 6 umpires in postseason games? - Bleed Cubbie Blue
Umpire C.B. Bucknor ends Brewers game with missed strike three
MLB umpires willing to let computers call balls and strikes: report
Today in Baseball History: Umpire John McSherry dies after collapsing on the field - NBC Sports
MLB Umps Wear White Wristbands to Protest Increased Verbal Attacks by Players, News, Scores, Highlights, Stats, and Rumors
Umpire Angel Hernandez loses again in lawsuit vs MLB when appeals court refuses to reinstate case
Max Scherzer's 'sticky stuff' ejection, and MLB's rules explained