Piazza defintely put up the numbers to be in the hall. No doubt about that. He is one of the best hitting catchers to ever play the game. But the PED cloud has taken down players with bigger names and better numbers.
Just look at Clemens and Bonds, both of them have the numbers and the cloud of PEDs. Both of them probably would have had Hall of Fame careers without PEDs.
So is Piazza opening the door for other PED users? It's an interesting question. I think if you put Piazza in you have to now put Bonds and Clemens in.
I think the biggest difference between Piazza and the other two is people liked him and people hated Bonds and Clemens.
Sure there is an odd fascination with Piazza's sexual orientation for some reason, but other than that he was generally liked.