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.