Earned Run Average (ERA) and its derivative, ERA+ are, unquestionably, the go to stats for evaluating pitcher performance. Seldom mentioned is Run Average, or RA. Yet, when the runs are tallied at the end of the game, it doesn’t matter whether some are earned and some not; they all count the same.
So, why don’t we pay more attention to Run Average? The conventional answer to this question is that so-called unearned runs are not the pitcher’s fault. All the blame rests solely on the defense. But, is this really true? Let’s find out!


