MLB Umpires To Wear Microphones & Announce Replay Decisions To Fans
Primer on How Expanded Instant Replay Will Work - The New York
A look inside the most controversial building in baseball
Controversial replay call costs Rangers game against White Sox
Pirates staff takes a tour of MLB's replay center
MLB open to mic on umps for replay calls, the way NFL referees
It's a Really Weird Time to Be an Umpire - The New York Times
They Call 'Em Like They See 'Em - Twinkie Town
Upon further review, instant replay a mixed bag