I don't understand how anyone could still be against replay after this postseason so far. My only concern with replay is what happens if a call is reversed. For example, what if a ball if fair that they called foul? Where do you put the batter? The play didn't continue, so nobody has any idea if the batter was going to get a single or a triple. What about a play at the plate? Let's say a guy gets called out at the plate (as the other runners are also attempting to advance). That's the third out that ends the inning. Replay reverses the call-where do you put the other runners who were advancing? The defense never got a chance to throw them out. The same thing happens with a catch or a trap. If it's a trap, where does the batter go and where do the runners on base go? What if it was on the infield where the fielder would have had a chance to throw runners or the batter out if it hadn't been ruled a catch to begin with? Expanded replay in baseball is really tricky because of that. I'm not concerned with the amount of time replay would take or the human element of the game, but I'm not sure how there can be a fair system of replay put into place. That shouldn't be a concern at all. Just use instant replay when it makes sense to use it. Don't use it when there's nothing you can do because of the situations you described.