The Seattle Mariners were established in 1977. They are the member of American League, West Division and they compete in MLB. The Mariners are based in Seattle, Washington. The home games are played at T-Mobile Park. The team colors are navy blue, metallic silver, northwest green, royal blue, yellow and cream. They haven’t won any AL Pennants or World Series Championships. They have won 3 West Division Championships which were played in 1995, 1997 and 2001.