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Padres left-hander Cory Luebke will begin a rehab assignment with High Single-A Lake Elsinore on Saturday. (AP Photo/Ben Margot) / AP
Cory Luebke continues to make progress in his return from a second Tommy John surgery.
The 30-year-old left-hander pitched a perfect inning in Double-A San Antonio's 6-2 loss on Friday, throwing six of his 11 pitches for strikes in his third scoreless appearance in five games on this rehab assignment.