The Houston Astros are an American professional baseball team based in Houston, Texas. The Astros compete in Major League Baseball (MLB) as a member club of the American League (AL) West division, having moved to the division in 2013 after spending their first 51 seasons in the National League (NL). The Astros have played their home games at Minute Maid Park since 2000.The Astros were established as the Houston Colt .45s and entered the National League as an expansion team in 1962 along with the New York Mets. The current name—reflecting Houston's role as the control center of the U.S. space program—was adopted three years later, when they moved into the Astrodome, the first domed sports stadium.
The Astros played in the NL from 1962 to 2012, first in the West Division from 1969 to 1993, followed by the Central Division from 1994 to 2012. While a member of the NL, the Astros played in one World Series, in 2005, against the Chicago White Sox, in which they were swept in four games. In 2017, they became the first franchise in MLB history to have won a pennant in both the NL and the AL, when they defeated the New York Yankees in the ALCS. They subsequently won the 2017 World Series against the Los Angeles Dodgers, winning four games to three, earning the team, and the state of Texas, its first World Series title.
The Seattle Mariners are an American professional baseball team based in Seattle, Washington. The Mariners compete in Major League Baseball (MLB) as a member club of the American League (AL) West Division. The team joined the American League as an expansion team in 1977. Since July 1999, the Mariners' home ballpark has been Safeco Field, located in the SoDo neighborhood of Seattle.
The "Mariners" name originates from the prominence of marine culture in the city of Seattle. They are nicknamed the M's, a title featured in their primary logo from 1987 to 1992. They adopted their current team colors – Navy blue, northwest green (teal), and silver – prior to the 1993 season, after having been royal blue and gold since the team's inception. Their mascot is the Mariner Moose.
The organization did not field a winning team until 1991, and any real success eluded them until 1995 when they won their first division championship and defeated the New York Yankees in the ALDS. The game-winning hit in Game 5, in which Edgar Martínez drove home Ken Griffey Jr. to win the game in the 11th inning, clinched a series win for the Mariners, served as a powerful impetus to preserve baseball in Seattle, and has since become an iconic moment in team history.
The Mariners won 116 games in 2001, which set the American League record for most wins in a single season and tied the 1906 Chicago Cubs for the Major League record for most wins in a single season.
Through the 2017 season, the franchise has finished with a losing record in 28 of 41 seasons. The Mariners are one of seven Major League Baseball teams who have never won a World Series championship, and one of two (along with the Washington Nationals) never to have played in a World Series. With the National Football League's Buffalo Bills ending their 17-year playoff drought on December 31, 2017, the Mariners now hold the longest playoff drought in all of the four major North American professional sports, having not qualified for the playoffs since 2001.