The Astros have completed 56 seasons in Major League Baseball, qualifying for the postseason eleven times and reaching the World Series three times (2005, 2017 and 2019). Established as an expansion franchise in 1962, the team's first winning season was in 1972. In 1980, the Astros made their first postseason appearance. From 1997–2005, the team made postseason appearances in six out of nine seasons. From 2006 to 2013, the franchise experienced a steady decline with consecutive 100-loss seasons in 2011, 2012, and 2013. In 2015, the team defeated the New York Yankees in the 2015 American League Wild Card Game. This was the Astros' first postseason appearance as an American League team, and first overall since 2005. It was also the Astros' first playoff win since Game 6 of the 2005 National League Championship Series. Houston would qualify for the playoffs again in 2017, defeating the Boston Red Sox in the 2017 American League Division Series and the New York Yankees in the 2017 American League Championship Series. The team would go on to defeat the Los Angeles Dodgers in the 2017 World Series, winning the championship for the first time in team history. However, it was later revealed in the Houston Astros' sign stealing scandal that the Astros had cheated in some portions of the 2017 regular season. They are only team to have qualified for the World Series as a member of both leagues, and one of two to have qualified for the League Championship Series in both leagues (the Milwaukee Brewers are the other team to have the same distinction as far as the League Championship Series goes).