Ranking baseball’s 5 best rivalries

Real rivalries must have something much more basic, and it really doesn't have all that much to do with the players in many instances: It's the fans. Kids in Boston learn to dislike the Yankees almost before they can walk. Kids in New York learn that it's not business as usual when the Red Sox come to town. While there's decades of history between the two clubs, it's still about the fans. They make it happen.