The San Diego Padres are an American professional baseball team based in San Diego, California. The Padres compete in Major League Baseball (MLB) as a member club of the National League (NL) West division. Founded in 1969, the Padres have won two NL pennants — in 1984 and 1998, losing in the World Series both years. As of 2017, they have had 14 winning seasons in franchise history. The Padres are one of two Major League Baseball teams (the other being the Los Angeles Angels) in California to originate from that state; the Athletics were originally from Philadelphia (and moved to the state from Kansas City), and the Dodgers and Giants are originally from two New York City boroughs – Brooklyn and Manhattan, respectively. The Padres are the only major professional sports franchise to be located in San Diego, following the relocation of the Chargers to Los Angeles in 2017. The Padres are the only MLB team that doesn't share its city with another major league professional sports franchise.
The Arizona Diamondbacks, often shortened as the D-backs, are an American professional baseball team based in Phoenix, Arizona. The club competes in Major League Baseball (MLB) as a member of the National League (NL) West division. The team has played every home game in franchise history at Chase Field, formerly known as Bank One Ballpark. The Diamondbacks have won one World Series championship (defeating the New York Yankees in 2001) – becoming the fastest expansion team in the Major Leagues to win a championship, which it did in only the fourth season since the franchise's inception.