The Cleveland Guardians are an American professional baseball team based in Cleveland, Ohio. The Guardians compete in Major League Baseball (MLB) as a member club of the American League (AL) Central division. Since 1994, they have played at Progressive Field. The team's spring training facility is at Goodyear Ballpark in Goodyear, Arizona. Since their establishment as a Major League franchise in 1901, the team has won 10 Central division titles, six American League pennants, and two World Series championships, (in 1920 and 1948). The team's World Series championship drought since 1948 is the longest active among all 30 current Major League teams. The team's name references the Guardians of Traffic, eight monolithic 1932 Art Deco sculptures by Henry Hering on the city's Hope Memorial Bridge, which is adjacent to Progressive Field. The team's mascot is named "Slider." The franchise originated in 1894 as the Grand Rapids Rustlers, a minor league team in the Western League. The team relocated to Cleveland in 1900 and was renamed the Cleveland Lake Shores. The Western League itself was renamed the American League while continuing its minor league status. One of the American League's eight charter franchises, the major league incarnation of the club was founded in Cleveland in 1901. Originally called the Cleveland Bluebirds, the team played in League Park until moving permanently to Cleveland Stadium in 1946. The Bluebirds name proved unpopular, and in 1903, the team was nicknamed the Cleveland Naps, after team captain Nap Lajoie. Following Lajoie's departure after the 1914 season, club owner Charles Somers requested that baseball writers choose a new name. They chose the name Cleveland Indians, a revival of the nickname that fans gave to the Cleveland Spiders while Louis Sockalexis, a Native American, was playing for the team. That name stuck and remained in use for more than a century. Common nicknames for the Indians were the "Tribe" and the "Wahoos", the latter referencing their longtime logo, Chief Wahoo. After it came under criticism as part of the Native American mascot controversy, the team ceased using the name "Indians" following the 2021 season, officially becoming the Guardians. From August 24 to September 14, 2017, the Indians won 22 consecutive games, the longest winning streak in American League history. As of the end of the 2021 season, the Guardians' overall record is 9,592–9,144 (.512).

Progressive Field

The Seattle Mariners are an American professional baseball team based in Seattle. 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, playing their home games in the Kingdome. Since July 1999, the Mariners' home ballpark has been T-Mobile Park, 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; the original colors continue to be used in alternate uniforms. Their mascot is the Mariner Moose. The Mariners did not field a winning team until 1991, and further success eluded them until the late 90s, the most successful period in franchise history. Led by Hall of Fame players Edgar Martínez, Ken Griffey Jr., and Randy Johnson, the Mariners clinched their first playoff berth in 1995 when they won their first division championship and defeated the New York Yankees in the ALDS. Martínez's walk-off double in Game 5 drove Griffey in from first base 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. They would later win their second division title in 1997. After Griffey, Johnson, and Alex Rodriguez all left the team, the Mariners, bolstered by the signing of Ichiro Suzuki, 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. The team would not make the postseason again until 2022, which was the longest active drought in the four major North American sports. As of 2024, the franchise has finished with a losing record in 30 of 48 seasons. The Mariners are the only active MLB franchise never to have appeared in the World Series, currently holding the longest active World Series appearance drought in MLB.