It 's only a short trip from there to robot umpires , and once robots are in charge of ball - and - strike calls , robots will have earned our trust as arbiters of justice .
Major League Baseball is expanding instant replay this year .
Major League Baseball 's only a short trip from there to robot umpires , and once robots are in charge of ball - and - strike calls , robots will have earned our trust as arbiters of justice .
Major League Baseball is expanding instant replay this year .