McHugh exited his rehab start Thursday because of tightness in his elbow and bicep, the Houston Chronicle's Jake Kaplan reports.
It seemed ominous when McHugh went out for the start of the second inning in his rehab start for Triple-A Fresno but then called for the trainer and exited. He is back in Houston on Friday visiting with team doctors. At this point an extended absence seems likely, so those in shallower formats without DL spots may want to cut bait. Mike Fiers will continue to occupy the fifth spot in the rotation in the meantime.