The White Sox claimed right-handed relief pitcher Yohan Ramírez, according to the team.
Ramírez, 28, owns a 3.67 ERA this season in 26 relief appearances and 34.1 innings. He's recorded three holds and 31 strikeouts with the Pittsburgh Pirates this season.
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The Houston Astros originally signed him as an international free agent in 2016. The Seattle Mariners then drafted him in the Rule 5 Draft in December 2019. Ramírez has also played for the Cleveland Guardians.
The move to place Ramírez on the 40-man roster moved the team's roster total to 39 players.