No one really asterisks the 2009 Yankees or any of the Red Sox championships, but unless you think Manny or A-Rod were roiding their entire careers, they should be HoFers.
It doesn't matter what he does for the rest of his career. If he hadn't lied in such a dumb way after being caught, maybe he'd dodge the label. Instead, he's gonna be the ringworm guy with a likely stellar career.