"Yeah. His name is Jedikiah, and he's actually a friend of mine." Which completely took Sam by surprise, but there it was. He liked and respected the guy, face and all.
Sam shook his head. "I don't think so. But you should know Jo's here." Because yeah. That could be an awkward surprise if he didn't know when he ran into her, or saw her posting or she replied to him. All sorts of things could go wrong with that, if Dean didn't now.