Astros pitcher Roy Oswalt is headed back to Houston to be examined by a team doctor after leaving Friday's start against the Pirates with a slight left hamstring strain.
Oswalt allowed one run and three hits in four innings before he was pulled as a precaution.
"I just want to get him checked," Houston general manager Ed Wade said. "Head colds concern me. Allergies concern me this time of spring training."
Oswalt Leaves Start With Hamstring Strain