Major League Baseball and the umpires are actively discussing the possibility. If the technical aspects can be worked out and the umps are comfortable with the concept, they could be mic'd up sometime this year. Both sides say there's lots of work to do, making it uncertain whether this could be in place by Opening Day on March 26.

Baseball fans have become familiar with seeing crew chiefs such as Joe West, Ted Barrett and Tom Hallion take off the headsets and signal the ruling from the replay center in New York -- either indicating a player is out or safe, or perhaps pointing to where a runner should go.