The results of Morton's MRI on his hamstring were worse than the Phillies were expecting, Todd Zolecki of MLB.com reports.
The team did not provide any specific details about the severity of the injury or how long Morton will be sidelined. Manager Pete Mackanin said, "We're going to see what happens in the next two or three days and see what the next step is." Adam Morgan will be recalled from Triple-A to take Morton's spot in the rotation.