Both series represented the first time the opponents had met in the postseason, and the Rockies' victory was their first in any postseason series. The Diamondbacks and the Rockies met in the NL Championship Series, with the Rockies becoming the National League champion and going on to face the American League champion in the 2007 World Series. This was the first time under the expanded playoffs format first used in 1995 that two teams from the National League's Western Division had played against one another in the NLCS.