Jul 11, 2007 7:44 AM EST

Red Sox DH David Ortiz privately mentioned last weekend the possibility he might require a surgical procedure on his right knee, but because of the uncertainty surrounding his condition, he said he didn't want to say anything publicly until he knew more.

But yesterday, when asked specifically about his condition by the Boston Herald, Ortiz admitted he "probably" would need a procedure after the season.

Ortiz had said in Detroit over the weekend that the knee began to bother him last season after he twisted it while fielding bunts in batting practice at Yankee Stadium, a routine hitters follow before taking their cuts.

He said he got the knee tangled in some netting and twisted it, which was the cause of his problems.

"Some days it's good, some days it isn't," Ortiz said.

Via Boston Globe