As I mentioned in my introductory piece, I come from a baseball background. It’s one of those things I hate to brag about, but I have written four books on it and if someone buys one today I might be able to go to Taco Bell next month. There has been one major statistical advancement that has taken that sport by storm. The concept of WAR is fairly recent, but there are already elements of it being used in the new MLB CBA.
Obviously, WAR (wins above replacement) has its detractors. I could go into a long and drawn out discussion on those, but suffice it to say, some people differ on the math involved while others differ on the concepts behind it.