Sure, but going bald that early isn't common and it is a side effect. And not all PED guys look like Canseco, heck almost none of the modern guys do because its not straight up steroids only that are banned now.
But put it all together for Pujols though and I know which way I'm guessing. Unheralded unknown goes to Dominican or other country for winter ball. Comes back to spring training as a different player ripping the cover off the ball and is huge. Going bald at like age 23. Was around Mcguire. Larussa was his manager. Past trainer says he was a PED guy, etc. I know which side I'd have my money on.
And to note, I'm not a PED basher, I think they've gone too far in banning too much and vilifying those who did. I just don't like the hypocrisies. Things like Pudge, Ortiz flying right into the Hall, Andy Petite getting steam to be in, etc. And when folks like Bonds are made out to be the devil and Pujols is not even though its very likely he was in on it too. All in all, its a summary of why the 'caught' ones should probably be given some slack, chances are, and proven by that anonymous test/list, that so many were doing it so the 'caught' ones aren't some evil outliers. It was just the game at the time.
Back to the real topic and every start this kid has being analyzed.