The Seattle Mariners are a professional baseball team that plays in Major League Baseball (MLB). The Mariners are a member of the West division in the American League (AL). The team was founded in 1977 as an expansion team in the AL. The Mariners did not have a winning team until 1991, and they did not make the playoffs until 1995 when they won their first division title. The team went on to win division titles in 1997 and 2001 and a Wild Card berth in 2000. However, the Mariners failed to reach the World Series in any of those seasons and are considered to be one of the greatest teams of all time to not win a Pennant. The Mariners have not made the playoffs since 2001.

The Mariners play their home games at T-Mobile Park in Seattle, Washington. During the late 1990s and early 2000s, the team had one of the most talented rosters ever compiled with players like Randy Johnson, Alex Rodriguez, Brett Boone, Edgar Martinez, and Ken Griffey Jr. Martinez and Griffey Jr. were both inducted into the MLB Hall of Fame as Seattle Mariners. Even with all of their great players, the Mariners never won more than an American League Division Series in the playoffs.