If you score 21 in one game and 1 in the next nine, or if you score 3 in every game, it says the same thing about your future expected offensive performance. (Or maybe it doesn't, but that's such an extreme example it hasn't been tested. At the types of things that happen to real baseball teams, this principle still works). Unrelated other than on the nearly universal subject of things I am right about, Welington Castillo's BABIP is down to .318 and now he's hitting 244/288/388