I am not sure what constitutes a knowlegeable fan. At a certain level, anyone who knows the score of a game is the knowlegeable fan because from sports, there is no greater piece of information needed than that simple fact. Baseball has the richest history of any sport and learning about that can, for some people, enhance the enjoyment of the game. Given the choice, I would much rather consider giving my ticket to a first time visitor to a ballpark than a tweedy self proclaimed loyal fan. A first time visitor would garner a wealth of visual and emotional riches. Mr. Tweedy could always catch up with what he missed on public radio.