There are 30 teams in Baseball right now, which means that all things equal, a team should win the World Series once every 30 years. The Royals last won the World Series 30 years ago, the Mets 29 years ago. This is a very unique thing. For starters only the Pirates in 1925 and the Giants in 1921 won the World Series with the exact interval of years between wins based on number of teams (16 years at that time). No other World Series winner has been within 5. And secondly, since both teams playing cannot be the exact interval of years since the last win, this is as close as it can be going in (Royals exact, Mets one off). Even in the years that the interval was correct, the Pirates played the reigning champ, and the Giants played a team that had never won.