The Cubs say the strain is not serious, and MRIs have shown no surgery is necessary. But he will take it easy this week, and doctors will consult with him over the weekend to determine the next plan of action.
Prior's arm troubles were the subject of Internet and broadcast speculation since the early portion of spring training, but Prior insists he had no arm problems until he felt soreness after a throwing session March 12 and pain during a March 14 session.
"I've been feeling great from the day I showed up to spring training," Prior said. "I can't say that enough. I'm aware of what's out there. I have never physically sat down and talked to anybody to incite the gossip that 'he and the Cubs have been covering up the bum shoulder for weeks.'"