Surgery in Mo's Future?

The NY Post's George King is reporting this afternoon that Mariano Rivera may need surgery to clean up his aching shoulder. Rivera has reportedly told friends he believes the discomfort is from bone spurs that would require surgical intervention.

UPDATE 4:28 PM from Peter Abraham.

Just spoke to Mariano Rivera. He has been been pitching with a sore shoulder all season. There is inflammation and calcification. He has been given two options: a series of injections and rehab or surgery. He has not made a decision but seems to be leaning toward the surgery.