As I remember, Rodney took HGH to recover from an injury, and, counting the suspension, ended up missing fewer games than if he didn't. Technically, to me, he still owns the moral high ground over someone who makes really stupid decisions with alcohol.
I think it's pretty tacky to use that moral high ground, but as others have said, he apparently feels the need to sensationalize the news as an announcer.
completely OT: I don't blame Manning for taking hgh (he did) to recover from his injury. I blame him for dumping the whole situation on his wife and getting no suspension for something he clearly did.