MLB Umps Are Getting More New Rules Wrong, Says Yanks Coach - InsideHook
Beyond the grunt: Umpires mic up, and baseball changes a bit
Will Expanded Instant Replay Lead To More Women Umpires?
Major League Baseball's worst call ever: Expanding instant replay - Los Angeles Times
How MLB Umpires Learned to Explain Replays to Crowds - The New York Times
At last, MLB umpires will communicate with fans about replay reviews - Bleed Cubbie Blue
Angel Hernandez now interim umpire crew chief after opt outs
MLB news: Umpires to use microphones to announce replay decisions
MLB umpire hospitalized after being hit in head by throw - Los Angeles Times