Meh, on a serious note, we truly can't tell for sure with a lot of these guys. Minute Maid is tiny and Altuve has the bat speed to make the homers happen. Probably just SSS shenanigans at work.
stats and the way a player looks are less of an indicator of their getting caught than their IQ's are. the system is such a joke (laughable substance list especially regarding masking agents, silly test administrator selection, timetable) that only the stupidest and most arrogant will pop positive.
the biggest PED bust in history (biogen) came as the result of zero positive tests despite the fact that the players had been tested hundreds of times over several years.