History and League Title Success
Its history dates back to 1898 and in 1920 were one of the original franchises of what is now the NFL as the Chicago Cardinals (the Cardinals and the Chicago Bears are the only two teams from the NFL's charter season to remain in operation). In Chicago they one one NFL championship (1947), but generally were a poor performing team (in 1944 due to a lack of available players during World War II they were temporarily merged with the Pittsburgh Steelers to form "Card-Pitt", mockingly called the "Carpets", fitting for a combined team finishing 0-10).
Unable to compete against the more successful cross-town rival Chicago Bears, the team relocated to St. Louis in 1960, keeping their nickname (not to be confused with the more successful baseball team of the same name). The team did not much better there, advancing to the playoffs only thrice and never hosting or winning any games.
Facing poor attendance and an aging stadium (and unwillingness on the city's part to build another multi-purpose stadium, by then the concept was falling out of favor), the team relocated to Phoenix in 1988, being called the Phoenix Cardinals until taking its current name in 1994. However, though the team has had somewhat better success than in Chicago or St. Louis, it has not translated into many playoff victories.
NFC West Rivals