The Arizona Diamondbacks (often shortened as the D-Backs) are an American professional baseball team based in Phoenix, Arizona. They play in the West Division of Major League Baseball's National League. Since the team's inception in 1998, the franchise has played home games at Chase Field, formerly known as Bank One Ballpark. The ballpark was renamed in 2005 as a result of Bank One Corporation's merger with JPMorgan Chase & Co. The Diamondbacks have won one World Series championship (in 2001), becoming the fastest expansion team in the major leagues to win a championship, doing it in only the fourth season since the franchise's inception in the 1998 Major League Baseball season.

Chase Field

The Colorado Rockies are an American professional baseball team based in Denver, Colorado. The Rockies compete in Major League Baseball (MLB) as a member club of the National League (NL) West division. The team's home venue is Coors Field, located in the Lower Downtown area of Denver. The Rockies have won one National League championship, in 2007, after having won 21 of their final 22 games in order to secure a Wild Card position. In the World Series they were swept by the American League (AL) champion Boston Red Sox in four games. They are one of two MLB franchises to have never won a division title (the other team are the Rockies' expansion brethren, the Miami Marlins).