Seattle Mariners

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 AL as an expansion team in 1977. Since July 1999, the Mariners' home ballpark has been Safeco Field, located in the SoDo neighborhood of Seattle. SoDo means "South of Downtown."

T-Mobile Park is a retractable roof stadium in Seattle, Washington, United States. It is the home ballpark of Major League Baseball's Seattle Mariners and has a seating capacity of 47,929. It is in Seattle's SoDo neighborhood, near the western terminus of Interstate 90. It is owned and operated by the Washington State Major League Baseball Stadium Public Facilities District. The first game at the stadium was played on July 15, 1999.

The stadium was originally named Safeco Field under a 20-year naming-rights deal with Seattle-based Safeco Insurance. T-Mobile acquired the naming rights on December 19, 2018, and the name change took effect on January 1, 2019.