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The upcoming 2026 season will mark the 50th season of the Seattle Mariners<\/a>. From their MLB beginning in 1977, the Mariners have played their home games at the Kingdome (1977-1999) and currently at T-Mobile Park<\/a>. Though established in 1977, the history of baseball in the Pacific Northwest dates back long before the birth of MLB baseball in the Emerald City. When attending a Mariners game at T-Mobile Park, fans can check out some of the region’s rich baseball history at the Baseball Museum of the Pacific Northwest<\/a>.<\/p>\n Baseball Museum of the Pacific Northwest inside T-Mobile Park, Photo by Andrei Ojeda, Stadium Journey<\/p>\n Seattle Steelheads throwback uniform. Photo Courtesy of Seattle Mariners<\/p>\n The throwback threads will be replacing the cream colored Sunday home threads the Mariners have worn since 2015.<\/p>\n Mariners Sunday home threads past and present. Courtesy of Seattle Mariners<\/p>\n The transition makes the Mariners the first MLB team to feature a Negro Leagues uniform as part of its regular uniform rotation. It\u2019s also paired with a significant community investment, as the club is launching the Steelheads Community Fund and committing $500,000 to support Black-led baseball and softball organizations and related community initiatives across the region. <\/p>\n \u201cWe are proud to honor our game\u2019s history and invest in the future of our community with Steelheads Sundays at T-Mobile Park,\u201d Mariners president of business operations Kevin Martinez said in a statement. \u201cThrough the Steelheads Community Fund, we will celebrate the legacy of the Steelheads, while continuing our long-standing effort to advance access to baseball and softball and well-being for underserved communities in our region.\u201d\u00a0(Daniel Kramer, MLB.COM<\/a>)<\/p>\n Photo Courtesy of Seattle Mariners<\/p>\n As the full scope of the fund\u2019s programming is still being finalized, the focus will center on local Black-led baseball and softball organizations, along with broader community initiatives aligned with access, participation and well-being. The Mariners have emphasized that collaboration with community leaders is central to shaping how the fund is deployed, aiming to ensure that resources are directed where they can have the greatest impact. <\/p>\n","protected":false},"excerpt":{"rendered":"The upcoming 2026 season will mark the 50th season of the Seattle Mariners. From their MLB beginning in…\n","protected":false},"author":2,"featured_media":446637,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[65],"tags":[363,99],"class_list":["post-446636","post","type-post","status-publish","format-standard","has-post-thumbnail","category-mlb","tag-mlb","tag-sports"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/446636","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/comments?post=446636"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/446636\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media\/446637"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media?parent=446636"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/categories?post=446636"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/tags?post=446636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"Baseball](\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2026\/02\/ca8cc2_fa2e2017256f4b17b2514411164b1307~mv2.jpg\")
<\/p>\n![\"Seattle](\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2026\/02\/ca8cc2_7cffdd79297b4ae0a809bea2884c9c81~mv2.jpg\")
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