Pythagorean Winning Percentage, initially established by Bill James, has been a useful tool for measuring how many games a given team “should” have won in a given amount of time, usually over the course of the better part of a full season of baseball. Given the general depth of knowledge in the VEB community, many of you probably already know how this metric is calculated. For those unfamiliar, though, the original formula was established as follows:
Runs^2 / [(Runs^2) + (Runs Allowed^2)]
I won’t get into the guts in this article as to how this formula has been refined since its first iteration, but I recently learned how to apply the current formula in R Programming which means you all get an article about it.