The Texas Rangers placed Tyler Mahle on the 15-day injured list Sunday and recalled fellow right-hander Kumar Rocker from Triple-A Round Rock.
Rocker (1-4, 8.87 ERA) will start the Rangers' game against the Chicago White Sox on Sunday afternoon in Arlington, Texas. He has never faced the White Sox in two major league seasons.
Sunday initially was scheduled as a bullpen game to provide an extra day off for Mahle. Texas manager Bruce Bochy confirmed Saturday that Mahle is dealing with right shoulder fatigue, and it was an issue in his most recent start against the Minnesota Twins on Tuesday.