There is no evidence whatsoever that either of the inductees took roids. By that logic, Lou Gehrig was on roids. Mac played with roiders, had a roider roll on him, grew to ridiculous proportions while putting up the biggest numbers the game had ever seen at the tail end of his career, then chose not to testify about roids so as not to incriminate himself.
While any one of those points is not, in and of itself, proof that he did, the cumulative effect is all but irrefutable.
I am convinced that each of the suspected cheaters did in fact cheat, I find it highly doubtful that you actually believe that Cal did so.