The final decision on surgery will be made later this week when Davis meets with doctors in New York.
Johan Santana is hoping to make it back to the majors this season. He is scheduled to make his next minor league rehab start on Friday.
"If in the next outing, everything goes fine, there might be a possibility to pitch in the majors," Santana said. "No question, if I have a chance to throw a couple of innings, but I don't see doing more than that. But it's definitely something I'm looking forward to."Assistant general manager John Ricco said that Jon Niese is not close to returning. Niese, who is suffering from a right intercostal strain, has been rehabbing in Port St. Lucie.