Span, who is scheduled to have another MRI exam on his right clavicle on Tuesday, originally hurt his shoulder landing awkwardly while trying to make a diving catch on Aug. 12. The MRI on his neck came back clean.
"He couldn't get through both of them today," assistant general manager Rob Antony said of the MRI exams. "Basically we're doing that just to make sure we're not missing anything. We want to rule everything out and give him peace of mind."
With Span out, Ben Revere started in center field with Darin Mastroianni getting the start in right field.