Professional baseball in the Pittsburgh area began in 1876 with the organization of the
Allegheny Base Ball Club, an independent (non-league) club based in a then-separate city called
Allegheny City, across the
Allegheny River from Pittsburgh. The team joined the minor league
International Association in 1877, only to fold the following season. On October 15, 1881,
Denny McKnight held a meeting at Pittsburgh's St. Clair Hotel to organize a new Allegheny club, which began play in 1882 as a founding member of the
American Association. Chartered as the Allegheny Base Ball Club of Pittsburgh, the team was listed as "Allegheny" in the standings, and was sometimes called the "Alleghenys" (occasionally the "Alleghenies" or “Allies”) in that era's custom of referring to a team by its pluralized city or club name. After five mostly mediocre seasons, Pittsburgh became the first
A.A. team to switch to the older
National League in 1887. During the winter prior to the 1890 season, almost all of the Alleghenys' best players bolted to the
Players' League's
Pittsburgh Burghers. The Players' League collapsed after the season, and the players were allowed to go back to their old clubs. However, the Alleghenys also signed highly regarded second baseman
Lou Bierbauer, who had previously played with the A.A.'s
Philadelphia Athletics. Although the Athletics failed to include Bierbauer on their reserve list, they loudly protested the Alleghenys' move. In an official complaint, an AA official claimed the Alleghenys' signing of Bierbauer was "piratical". This incident quickly accelerated into a schism between the leagues that contributed to the demise of the A.A. Although the Alleghenys were never found guilty of wrongdoing, their allegedly "piratical" act gained them the occasional nickname "Pirates" from newspapers around the country, starting in 1891. Within a few years, the nickname caught on with even Pittsburgh newspapers. The nickname was first acknowledged on the team's uniforms in 1912. in a poster celebrating their National League pennant.
Frank Chance of Chicago and
John McGraw of New York, two teams the Pirates beat for the pennant, are being made to
walk the plank. Early on, the Pirates organization finished no higher than 2nd in either league’s standings, but their fortunes began to change at the turn of the 20th century. The Pirates acquired several star players from the
Louisville Colonels, who were slated for elimination when the N.L. contracted from 12 to 8 teams. (The franchises did not formally consolidate; the player acquisitions were separate transactions.) Among those players was
Honus Wagner, who would become one of the first players inducted to the
Baseball Hall of Fame. The Pirates were among the best teams in baseball in the early 1900s, winning three consecutive National League pennants from 1901 to 1903 and participating in
the first modern World Series ever played, which they lost to
Boston. The Pirates returned to the World Series in
1909, defeating the
Detroit Tigers for their first-ever world title. That year, the Pirates moved from
Exposition Park to one of the first steel and concrete ballparks,
Forbes Field. during the
1925 World Series, where they won their second title As Wagner aged, the Pirates began to slip down the National League standings in the 1910s, culminating in a disastrous 51–103 record in 1917; however, veteran outfielder
Max Carey and young players
Pie Traynor and
Kiki Cuyler, along with a remarkably deep pitching staff, brought the Pirates back to relevance in the 1920s. The Pirates won their second title in
1925, becoming the first team to come back from a 3–1 deficit in the World Series. The Pirates returned to the World Series in
1927 but were swept by the
Murderer's Row Yankees. The Pirates remained a competitive team through the 1930s but failed to win the pennant, coming closest in 1938 when they were passed by the
Chicago Cubs in the
final week of the season. Despite the prowess of
Ralph Kiner as a slugger during the latter half of the stretch, the Pirates were mostly undistinguished in the 1940s, and downright awful in the early 1950s.
Branch Rickey was brought in during this time to rebuild the team, which returned to the World Series in
1960. They were largely outscored over the course of the series by the
Yankees, yet the Pirates won on a walk-off home run by
Bill Mazeroski in the bottom of the 9th inning in Game 7. As of 2024, it is the only Game 7 walk-off home run in World Series history. Led by right fielder
Roberto Clemente, the Pirates remained a strong team throughout the 1960s but did not return to the World Series until
1971. Playing in the new
Three Rivers Stadium, the Pirates defeated the favored
Baltimore Orioles behind Clemente's hitting and the pitching of
Steve Blass. In the same year on September 1, the Pirates became the first team to field an all-Black and Latino lineup. Despite Clemente's death after the 1972 season, the Pirates were one of the dominant teams of the decade, winning the newly created
National League East in
1970,
1971,
1972,
1974,
1975, and
1979. Powered by sluggers such as
Willie Stargell,
Dave Parker, and
Al Oliver, the team was nicknamed "The Lumber Company." Behind Stargell's leadership and the
disco song
"We Are Family" (which the team adopted as its theme song), the Pirates came back from a 3–1 deficit to once again defeat the
Orioles in the
1979 World Series for the franchise's fifth championship. During the 1979 championship season, a Pittsburgh player was designated as Most Valuable Player in every available category: All-Star Game MVP (Dave Parker), NLCS MVP (Willie Stargell), World Series MVP (Willie Stargell), and National League MVP (Willie Stargell, shared with Keith Hernandez of St. Louis). The Pirates sank back into mediocrity in the 1980s and returned to post-season play in the early 1990s behind young players like
Barry Bonds,
Bobby Bonilla, and
Doug Drabek. The Pirates won three straight division titles from 1990 to 1992 but lost in the
National League Championship Series each time, notably coming within one out of advancing to the World Series in
1992. Several of the team's best players, including Bonds and Drabek, left as free agents after that season. With salaries rising across baseball, the small-market Pirates struggled to keep pace with the sport and they posted a losing record for 20 consecutive seasons, a record among North American professional sports teams. Even the opening of a new stadium in 2001,
PNC Park, did little to change the team's fortunes. The Pirates finally returned to the postseason in
2013 behind National League MVP
Andrew McCutchen, defeating the
Cincinnati Reds in the
Wild Card Game. They were eliminated in five games in the
next round by the
St. Louis Cardinals. That season, the Pirates also became the seventh MLB team to reach 10,000 all-time wins. On
Opening Day 2015 the Pirates' loss was the team's 10,000th making the Pirates the fourth MLB team to achieve this distinction, following the
Philadelphia Phillies,
Atlanta Braves, and the Chicago Cubs. The Pirates returned to the postseason in 2014 and 2015 and lost the Wild Card game both times and have not qualified for the playoffs since then. ==Ballpark==