The Pirates have designated Zach Stewart for assignment, according to MLB.com's official transactions page. The move was made in order to clear a spot on the 40-man roster for Jeff Karstens, whom they signed earlier this week.
Stewart was acquired from the Red Sox for a player to be named later in late November. In 103 career major league innings at the MLB level, Stewart has a 6.82 ERA with 5.6 K/9 and 1.9 BB/9. He's no stranger to the pages of MLBTR, having been traded four times since being drafted by the Reds in 2008.
