{"id":319755,"date":"2026-11-02T21:36:07","date_gmt":"2026-11-02T21:36:07","guid":{"rendered":"https:\/\/www.newsbeep.com\/us-pa\/319755\/"},"modified":"2026-11-02T21:36:07","modified_gmt":"2026-11-02T21:36:07","slug":"mariners-claim-isaac-mattson-off-waivers-from-pirates","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/us-pa\/319755\/","title":{"rendered":"Mariners Claim Isaac Mattson off Waivers From Pirates"},"content":{"rendered":"<p>\t\t\t\t<img width=\"1120\" height=\"630\" src=\"https:\/\/www.newsbeep.com\/us-pa\/wp-content\/uploads\/2026\/11\/Mattson.jpg\" class=\"attachment-medium size-medium tpd-force-16x9-aspect-ratio wp-post-image\" alt=\"Isaac Mattson, Pittsburgh Pirates\" decoding=\"sync\" fetchpriority=\"high\"   loading=\"eager\" data-cf-ratio=\"788x444\"\/>Isaac Mattson\/Photo provided by Matt Lynch\t\t\t\t<\/p>\n<p class=\"wp-block-paragraph\">The Mariners have claimed relief pitcher Isaac Mattson off waivers from the Pirates. <\/p>\n<p class=\"wp-block-paragraph\">Mattson burst onto the scene for the Pirates last season after making three appearances for Pittsburgh in 2024. In 44 relief appearances in 2025, the right-hander went 3-3 with a 2.45 ERA. He struck out 45 batters in 47.2 innings and held opponents to a .203 batting average and a .600 OPS.<\/p>\n<p class=\"wp-block-paragraph\">The Pirates were hoping Mattson would be able to replicate his success this year but he was not able to. The 31-year-old shuffled between the majors and Triple-A Indianapolis, totaling 38 big-league appearances. He went 0-0 with a 5.35 ERA and finished the year on the injured list due to a right hip impingement. <\/p>\n<p class=\"wp-block-paragraph\">In 85 total appearances with Pittsburgh from 2024-26, Mattson went 3-3 with a 3.83 ERA. He\u2019ll now look to earn a spot in Seattle\u2019s bullpen and reestablish himself. <\/p>\n<p>\t\t\t\t\t\t\t\t\tMentioned in this article:<a href=\"https:\/\/pittsburghbaseballnow.com\/tag\/isaac-mattson\/\" rel=\"tag nofollow noopener\" target=\"_blank\">Isaac Mattson<\/a> <a href=\"https:\/\/pittsburghbaseballnow.com\/tag\/pittsburgh-pirates\/\" rel=\"tag nofollow noopener\" target=\"_blank\">Pittsburgh Pirates<\/a><\/p>\n<p class=\"categories single-categories\">More about:<a href=\"https:\/\/pittsburghbaseballnow.com\/pirates-transactions\/\" rel=\"tag nofollow noopener\" target=\"_blank\">Pirates Transactions<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"Isaac Mattson\/Photo provided by Matt Lynch The Mariners have claimed relief pitcher Isaac Mattson off waivers from the&hellip;\n","protected":false},"author":2,"featured_media":319756,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[40353,73,75,74,10997],"class_list":["post-319755","post","type-post","status-publish","format-standard","has-post-thumbnail","category-pittsburgh","tag-isaac-mattson","tag-pittsburgh","tag-pittsburgh-headlines","tag-pittsburgh-news","tag-pittsburgh-pirates"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us-pa\/wp-json\/wp\/v2\/posts\/319755","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us-pa\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us-pa\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-pa\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-pa\/wp-json\/wp\/v2\/comments?post=319755"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us-pa\/wp-json\/wp\/v2\/posts\/319755\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-pa\/wp-json\/wp\/v2\/media\/319756"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us-pa\/wp-json\/wp\/v2\/media?parent=319755"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-pa\/wp-json\/wp\/v2\/categories?post=319755"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us-pa\/wp-json\/wp\/v2\/tags?post=319755"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}