Span, who originally hurt his shoulder trying to make a diving catch on Aug. 12, said he was given medication to try to stay still for 35 minutes, but couldn't do it. He had a less-intrusive MRI exam taken on his neck on Monday, and that came back clean.
"I went and tried to get an MRI today and it didn't work out," said Span, who was held out of the lineup for an eighth straight game. "So today I didn't accomplish much. I felt better yesterday, so that was a good sign."
Span felt good enough to take batting practice on the field for the first time since the injury, and is expected to rehab without having the MRI on his right clavicle. He originally took X-rays on Aug. 12 that determined he didn't break anything.
So the Twins remain hopeful he'll stay off the disabled list, and cited their callup of fourth outfielder Matt Carson on Friday as a reason why they can wait.
"That's the reason we went to an extra player and dropped a pitcher, to see where this took us and to see how long it was going to be with Denard," Twins manager Ron Gardenhire said. "Our goal is not to put him on the DL, and we're still not right now. We'll see how it turns out; we'll see how it goes."