If you’re happy and you know it, get on base

Ah, the Saber-sphere is all abuzz with talk of regression to the mean.  Regression to the mean is a fairly simple concept.  If, over the past four years, you have a player who has had HR/PA rates of 2.8%, 1.9%, 2.3%, and 2.4%, then suddenly, his rate goes to 7.3%, what should you expect in […]