Blake Treinen

Uncommon card · No. 194805

Blake Michael Treinen ( TRY-nen, born June 30, 1988) is an American professional baseball relief pitcher who is a free agent. He has previously played in Major League Baseball (MLB) for the Washington Nationals, Oakland Athletics, and Los Angeles Dodgers. Treinen played college baseball for the Baker Wildcats and South Dakota State Jackrabbits. The Athletics selected him in the seventh round of the 2011 MLB draft. He was traded to the Nationals in 2013 and made his major league debut in 2014. After losing his closer role, the Nationals traded him back to Oakland in 2017, and Treinen was an All-Star in 2018. After again losing the closer role in 2019, he joined the Dodgers and pitched on the 2020, 2024 and 2025 World Series championship teams.

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