It's been said about Livan Hernandez, Joey Eischen (), Aaron Boone, Paul LoDuca and probably others I can't recall.
lots of people hate Livo, but he's been a large (hurr) part of the Nats for years and the guy knows how to pitch. He doesn't have crap as far as stuff and yet is still going and still able to contribute even if as a 5th starter. I think he could be very good teaching the kids some stuff. The others you listed, not so much.
I hope this RGIII guy is good if the 'Skins draft him, he cost a lot. I'd hate to see the team mired in another decade of mediocrity.