The Seattle Metropolitans were a professional ice hockey team based in Seattle, Washington, which played in the Pacific Coast Hockey Association from 1915 to 1924. During their nine seasons, the Metropolitans were the PCHA's most successful franchise; their 112–96 overall record better than second place Vancouver's 109–97 record. The Metropolitans won five PCHA Championships to Vancouver's four with Seattle finishing second on three other occasions. The Metropolitans played their home games at the 2,500 seat Seattle Ice Arena located downtown at 5th and University.
The Metropolitans made seven postseason appearances in their nine seasons, playing for the Stanley Cup three times between 1916–17 and 1919–20. The Metropolitans won the Stanley Cup in 1917, tied for the Cup in 1919 and lost in five games in 1920. The inspiring story of the Metropolitans' 1917 championship, making Seattle the first American team to win the Cup, was chronicled in the 2019 book, When It Mattered Most. Seattle's Stanley Cup championship occurred 11 years before the New York Rangers became the National Hockey League's first American franchise to win the Cup in 1928.