Some of you no doubt missed the Knights game a few weeks back where they were observing rule changes including the ball-strike calls. There is no plan to have robots call all balls and strikes. The only change would be that each batter or pitcher/catcher has one appeal during each at-bat of the ball/ strike call. Then they go to the recorded info on the previous pitch and someone decides whether the call is upheld or changed. I lack further details as to how the appeal is decided. The ruling is made quickly then the game moves on.