Luebke, 30, last appeared in a game on June 30. He had essentially been throwing one inning ever three days during a rehabilitation stint that began on June 13 with Class A Advanced Lake Elsinore.
Luebke had his first reconstructive surgery on his left elbow in May 2012 and then, after he was well into his rehabilitation program, needed a revision in February 2014.
In all, Luebke has had seven outings in the Minor Leagues this season, with Lake Elsinore, Double-A San Antonio and now El Paso. He has a 3.86 ERA in seven innings, allowing three hits with four walks and four strikeouts.
Luebke hasn't appeared in a Major League game since April 27, 2012. He's 10-12 with a 3.25 ERA in 188 1/3 career innings with the Padres from 2010-12.
Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.