The Pittsburgh Pirates have acquired right-handed pitcher Tyler Yates from the Atlanta Braves in exchange for minor league pitcher Todd Redmond. The Pirates also designated infielder Josh Wilson for assignment, unconditionally released pitchers Byung-Hyun Kim and Juan Perez, and reassigned infielder Jorge Velandia and pitcher Jaret Wright to minor league camp. In addition, the Pirates selected Doug Mientkiewicz from Triple-A Indianapolis and added him to the 40-man roster.