Why even bother believing those guys are clean. I wouldn't be in the least bit surprised if Pujols juiced. NO ONE would surprise me. I don't put it past anyone. It's the era. I really don't even care at this point. It makes no difference to me. I suspect everyone did. It was a level playing field, no one got any advantages over the other because they were all juicing. The hitters, the pitchers, everyone.
Of course there were probably some clean guys as well, but they were likely the VAST minority. So I don't see everyone's stats as being "tainted", I just look at is as the steroid era, just like the dead ball era, or any other. It is what it is.