Sano's OPS is also about 50 points lower thsn 2015. It perhaps would have been more accurate to say that there's been little, if any, improvement over the last TWO years. Also, nearly all of his OPS improvement this year is tied to his 35 point batting average increase which is in turn tied to his 60 point BABIP increase. So, one could argue, as I did, that there really hasn't been an improvement in his game, merely an improvement in his luck. As I said somewhere, his BABIP in 2017 is sky high (.385). Can he sustain that indefinitely? Probably not. His career BABIP is .365. Can he sustain that? Maybe. I'd say he's certainly capable of a BABIP of .330 to .350 for the next 5-7 years. But, without additional improvement, just a decrease in his BABIP next year to .350 drastically alters his batting average, on base, etc simply because he puts a relatively small number of balls in play.