1. So you are objecting to an unknown amount of subjectivity for a professional who has far less emotional investment in the event, but are willing to accept the subjectivity of fans who care deeply about the players and have their own biases already formed? I'm not going to say that scorers are perfect, but the parameters in place for them should give us much better data than the memories of fans. 2. The key to any metric is understanding the flaws of the metric, or rather, understanding the use of the metric so that it isn't used in a flawed way. For example, the topic of defensive shifts for players in ZR. How much of an obstacle is this? Have you looked at the ZR chart? The coverage for any position is fairly large. If the number of plays that is missed because a player can't make a play because of being in a position shift is large, that is a problem with the team's positioning, and less a problem for the stat. Again, ZR isn't trying to tell us how inherently good a player is. It is trying to tell us how many plays that player made relative to peers. If a player didn't make a play, he didn't make a play. The whole point of positioning would be to hopefully make more plays, not fewer. If a team consistently puts their players in bad positions and misses plays because of it, I would hope they could realize such and adjust. This is one of the areas where ZR and UZR aren't neccessarily good predictors. They just attempt to give us value after the fact. 3. Again, this can be true of any metric. I don't think Milton Bradley is a great hitter. But he was last year. UZR says that Hall was a top 10 defender at 3B last year. Some people will disagree strongly with that. But there's no way that anybody here could objectively list the top 10 performers last year at 3B based on their observations. Nobody has enough time to watch those games, and even if they did, they couldn't account for what they saw better than what ZR and UZR already give us. That doesn't mean that I expect Hall to be a top 10 defender this year. I probably expect Hall to be average or above, because I believe he improved at 3B as he accumulated more time there, but that is just my personal opinion.