The Rangers have designated Luis Martinez for assignment, the team announced. The move creates room on the 40-man roster for A.J. Pierzynski.
Martinez, 27, is a .182/.276/.260 career hitter in 87 big league plate appearances with the Padres and Rangers. Texas acquired the catcher from San Diego last offseason, and he hit .270/.350/.386 in 247 plate appearances for their Triple-A affiliate this summer.