Iglesias had a career .310 BABIP, so nothing all that special, although it was all over the place from a .276 to .356 in his full seasons. You always hear about BABIP being connected to speed, but looking at the top batters in it over a decent length of time, there seems to be a mix of hitter types and not speed guys in a particularly large number. Also, as
@Pitt the Elder showed, his speed hasn't really changed since he hit the majors, so it wouldn't be the sign of sudden juicing changing something. His exit velocity didn't change all that much either, so I don't see any signs there. Unless he's been on PEDs his whole career, which is entirely possible even with testing (I'm a jaded child of the steroid era, I'm never surprised when somebody gets caught for it even if I don't go looking for people to suspect) his BABIP and his success this year doesn't seem to be connected to any new body chemistry. It seems a lot more about his much higher LD rate than anything else.