White Sox acquire minor-league pitcher Thyago Vieira

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Seattle Mariners relief pitcher Thyago Vieira throws against the Baltimore Orioles in the ninth inning of a baseball game Monday, Aug. 14, 2017, in Seattle. | Elaine Thompson/Associated Press

The White Sox added a stable arm to their prospect pool.

The Sox announced Thursday they acquired minor-league pitcher Thyago Vieira from the Mariners for $500,000 in international signing-bonus pool money.

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Vieira, whom MLB.com rated as the No. 8 prospect in the Mariners’ organization, spent the majority of his time in the minor leagues last season, playing for Class AA Arkansas and Class AAA Tacoma. He combined to go 2-4 with a 4.00 ERA (24 ER/54 innings), four saves and 46 strikeouts in 41 appearances. The 24-year-old right-hander limited right-handers to a .194 (25-for-129) average.

Vieira also made one appearance with the Mariners last season. He retired all three batters he faced in his major-league debut against the Orioles on Aug. 14. He became the fifth Brazilian to play in the major leagues, joining Yan Gomes, André Rienzo, Paulo Orlando and Luiz Gohara.

Vieira was selected to compete for the World Team in the All-Star Futures Game in Miami, where he threw two-thirds of an inning without allowing a run.

The Sox claimed corner outfielder Daniel Palka from the Twins earlier this month.

Palka, who has no major-league experience, connected for 11 homers at Class AAA Rochester in 2017 while hitting to a .274/.329/.431 slash line in 362 plate appearances. He missed almost two months with a fractured left index finger.

The Sox’ 40-man roster is at 36.

Follow me on Twitter @madkenney.

Email: mkenney@suntimes.com

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