High Quality Content by WIKIPEDIA articles! The 2006 National League Championship Series (NLCS), the second round of the 2006 National League playoffs, began on October 12 and ended on October 19; it was scheduled to begin on October 11, but was postponed a day because of inclement weather. The St. Louis Cardinals upset the heavily-favored New York Mets in seven games to advance to the 2006 World Series against the Detroit Tigers.