The injury occurred in the closing stages of the first half and the watching Sir Bobby was less than happy with the standard of the medical treatment he received.
"I am angered by this," said Sir Bobby.
"He suffered a bad fall and his shoulder came out. They put it back in again, but then it popped out again in the dressing room when I went down to see him.
"He went to hospital for the X-ray and although there's no break he's now going to be out for a while.
"They reckon if it settles down he might be able to play in two weeks, but if it's going to keep coming out then he may have to require further surgery.
"It's a shame for him. With the run in we might have lost a good player."