There is no sport with a greater history (or perhaps, no sport which relies on its own history more) than baseball. Of course, as a lifelong baseball fan, one who played for nearly 10 years, I'm somewhat biased, but in terms of the sheer amount of statistics (and the variety of different stats), no sport comes close to being close. No other sport has the combination of a rich history and the scores of varied statistical metrics that allow for legitimate comparisons of ballplayers whose careers were separated by over a century. In fact, arguments about baseball players go back as far as the establishment of the game itself, and you can find hundreds of examples in newspapers, major magazine articles, and yes, blogs, about which player was better than whom. Fortunately, unlike other sports, the statistics intrinsic to America's National Pastime afford us the ability make draw legitimate comparisons across decades, which is what this series will be all about: The Top 20 Greatest N...