Safeco Field (now T-Mobile Park) opened in 1999

Safeco Field opened in 1999 as the new home ballpark for the Seattle Mariners, replacing the Kingdome. The stadium, renamed T-Mobile Park in 2019, features a retractable roof and has hosted regular-season games, All-Star events, and other major sporting occasions. Its construction and opening marked a significant moment in Seattle's modern professional baseball history.