Michael Fulmer agreed to a minor league contract with the Mariners after being released from a Royals deal. Fulmer, 32, missed the 2024 season while recovering from UCL surgery and has moved between the Red Sox, Cubs and Royals this year, repeatedly clearing waivers and electing free agency. He has thrown 5 2/3 major-league innings (three earned runs) and 54 1/3 Triple-A innings with a 3.98 ERA, 29.8% strikeout rate and 10.5% walk rate. Fulmer won AL Rookie of the Year in 2016 and transitioned to bullpen work, producing a 3.55 ERA across 190 1/3 innings from 2021–2023. The signing provides non-roster bullpen depth for Seattle.
Fulmer, 32, is having a nomadic year. He signed a two-year minor league deal with the Red Sox ahead of the 2024 season. He had undergone UCL surgery and was going to miss that entire campaign. He came into 2025 with a chance to earn a job on Boston's roster. He didn't break camp with the club but was called up by mid-April. He was designated for assignment a few days later, clearing waivers and electing free agency.
Around those transactions, he has thrown 5 2/3 big league innings, allowing three earned runs on six hits and two walks with three strikeouts. He has also thrown 54 1/3 Triple-A innings with a 3.98 earned run average, 29.8% strikeout rate and 10.5% walk rate. Fulmer also has past success on his track record. He initially broke in as a starter with the Tigers and won American League Rookie of the Year in 2016.
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