Chad Harville left his first rehab outing for Class AA Round Rock after feeling a twinge in his right hamstring muscle.
Harville, who has been out of action since May 5th with a strained hamstring muscle, will not make his next scheduled appearance tomorrow at Round Rock, but will instead continue his rehab in Florida with the Astros under the supervision of team trainers. He had pitched a scoreless 14-pitch inning before departing last night.