First let me say I am not a big WAR believer. It is used a lot to measure performance now but I don't buy everything about it. Math and analytics are obviously important to the game of baseball. We use it to compare players and a players performance all the time. There are, however, things that math doesn't tell us. It doesn't tell us that players are hurt and that is why they had a down month or down year. It doesn't take into account lot's of human elements it just cruelly spits out the numbers of performance. Can we glean information from those numbers? Sure. We can create averages and figure out how certain players will perform at certain levels year in and year out? Sure, but over time the math just doesn't project very well. Players decline sometimes rapidly and the math lied to us. Sometime players over perform for other various reasons and the math didn't see it coming. So IMO math is not the be all end all for measurement but it is very important at giving us an idea of what value a player might have over another player over time. Projection systems based on math are tough to swallow because there are so many things that can happen in a season that it is hard to take them seriously. The beauty of this sport is that anything can happen any given game. Even if a great pitcher makes a bad pitch at a bad time then game over. I like the math stats that people bring out on this board. Often times it changes my perception about a player or situation. And even though math experts will say the numbers don't lie I think when used incorrectly they at the very least mislead.