How do the PED dealers and PED users hook up initially? Is there some kind of underground railroad or code system in baseball that only the players are in on? How do they know what to use and where to get it? It's not a coincidence that these players ended up at the same place, so they have to be interacting with each other, right? How do they know which players to interact with and who to avoid? There has to be a lot of behind-the-scenes stuff going on among players, so how do the users hide it from the non-users, and know who is who?