He didn't claim to be in on the Steelers' training. He claimed to have been in their training room a long time ago.
I've met a couple of guys who claimed to have been in NFL training rooms (and who I believe were telling the truth). They were not NFL players, although they were both related to one. I wouldn't be surprised to find another such on a steelers bboard. They're not as uncommon as you'd think.
I stayed in a Holiday Inn Express last night. Now I'm qualified to critique the Steelers training staff.