League average hovers around .300. It's a decent way to predict the "luck" of pitchers, but it's not as good at predicting "luck" of hitters because some hitters can hit directionally very well. That being said, new data is showing that "good" pitchers are "good" at inducing weak infield grounders which would boost BABIP even on a defensively challenged team. If you watched the World Series last year you know this story well (and know how dull it is to watch as a baseball fan). But no, he's not likely to have 1-hitters the rest of the way through 2017 unless he is shooting for the MVP. Buxton, et al,, have done a lot for Santana this year.