High Quality Content by WIKIPEDIA articles! The 2003 National League Championship Series (NLCS) was a Major League Baseball playoff series played from October 7 to October 15 to determine the champion of the National League, between the Central Division champion Chicago Cubs and the wild-card qualifying Florida Marlins. The Cubs, by virtue of being a division winner, had the home field advantage. The Marlins came back from a three games to one deficit and won the series in seven games, advancing to the World Series against the New York Yankees.