My (unsubstantiated) guess is weed. What a silly thing to flag someone for. Unless there is an MLB rule that bans anyone who smoked in college or HS. ??? Wouldn't you be suspended if you get caught with weed in your system in a drug test under MLB policy? If so, it's not a silly thing. No, it's a ridiculously silly thing because that's what 17-20 year olds do. They drink, they experiment with drugs, they want to sleep with hot chicks, etc. As long as they can handle themselves like normal humans, it really shouldn't be an issue. "Oh ARod, there's a little weed in your system, sorry we aren't going to draft you #1." Nope, don't think that's the way it's working.