Claudio had pitched two scoreless innings at Round Rock in his only appearance. He had a 2.87 ERA in 18 appearances with the Rangers last season. Klein, who is expected to start at Round Rock, had retired all nine batters he faced in two games with Texas.
T.R. Sullivan is a reporter for MLB.com. Follow him on Twitter @Sullivan_Ranger and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.