Astros pitcher Lance McCullers said a recent MRI showed no significant injury to his sore right shoulder but acknowledged there is no timetable for his return to the mound.

McCullers spoke with reporters Saturday, one day after undergoing the MRI. The hard-throwing right-hander said he still has soreness in his pitching shoulder and that he will approach his recovery on a day-by-day basis.

"The MRI came back 100 percent clean," McCullers said. "I'm fine."