Poopie, you're being silly. Tranquilo.
"Those baseball players" are actually Barry Bonds before and after. Nadal plays the most cardio-intensive form of tennis so the fact that he has that kind of musculature after several years on the tour is really quite incongruous.
My point is, there's a pattern there whose dots aren't unreasonable to join. But the pattern is proof of absolutely nothing.
And the recent revelations about the passport being beaten by micro-dosing, like you rightly say, put a cloud over the entire sport. Literally any player could be doping and getting away with it. So it makes it impossible to make individual judgments about the pattern of any particular athlete because the baseline (i.e., control group) you necessarily have to make it to is complete shot, and therefore unusable.
Like I said earlier, post-Sharapova, post-Armstrong, post-BALCO, post-Biogenesys, by all means suspect athletes. Change the culture so that federations begin taking additional steps requiring athletes to do far more to prove themselves clean.