Through the course of baseball history, the Cubs have been involved in exactly two pennant battles that garnered national attention - Merkle's Boner and the Bartman incident. The Merkle incident was extensively covered in the original series, and I'd bet money that 2003 will get its due in the new eps. I'm amazed that some of our more historically-aware posters are questioning the importance of the Polo Grounds. Just scratching the surface, we see that three MLB teams called it home over the course of 73 years, beginning in 1890. It was the site of 14 World Series, the Merkle incident, the SHRTW, the ascension of Babe Ruth and the entire Yankee franchise. MLB as a national concern was basically born at the Polo Grounds.