History of the Pittsburgh Steelers Dallas defeated the Steelers in Super Bowl XXX to become the second team behind San Francisco to win five Super Bowl Championships. Ten years later, Pittsburgh would join Dallas and San Francisco to become the third team to reach that milestone when they defeated the Seattle Seahawks in Super Bowl XL. Three years later, the Steelers would become the first team to win a sixth Super Bowl, achieving that milestone in the 2008–09 season. They played against the Arizona Cardinals in Super Bowl XLIII, with a 27–23 comeback victory. The Broncos have competed in seven playoff games against the Steelers,
Pittsburgh Steelers (16) and hosted more conference championship games (11) than any other NFL team. The Steelers have won 8 AFC championships, tied with the Denver Broncos, but behind the New England Patriots' record 10 AFC championships. The Steelers share the record for second most Super Bowl appearances with the Broncos, and Dallas Cowboys (8). The Steelers lost their most recent championship appearance, Super Bowl XLV, on February 6, 2011. The Steelers, whose history traces to a regional pro team that was established in the early 1920s, joined the NFL as the Pittsburgh Pirates on July 8, 1933, owned by Art Rooney