His season has more to do with an incredibly high BABIP (.379) than it does anything else. He's hitting .346/.390/.516 this year, but hit .305/.339/.470 in KC last year with a BABIP of .332. I suppose you could try to make the argument that the high BABIP is the result of extra help, but it's not like he's hitting for a ton of power. He was on pace for roughly the same amount of HR and 2B as last year, but the SLG was helped by having 10 triples already (likely a result of the home ballpark and "Triples Alley"). His Line Drive rate is up by about 1% over last year, but he's actually hitting more ground balls and less fly balls than last season. Basically, he's hitting so much better this season because more balls are sneaking through the infield. Unless someone can prove higher testosterone causes more balls to sneak through the infield, I'm more likely to believe this season is a lucky fluke more than the result of being on something.