Yankees closer Mariano Rivera confirmed he will undergo surgery on his vocal cords Friday.

"They have to cut some polyps off the vocal cords," Rivera said Wednesday night at a Salvation Army banquet, where he received the organization's Pinnacle of Achievement award. "We decided to do it as soon as possible."

The operation will be performed at New York's Columbia-Presbyterian Medical Center, and will leave the 42-year-old speechless for a time.

"A week without talking," baseball's all-time saves leader said, "then another week and I'll be fine. I don't like surgery, but the doctor said 'nothing serious.'"

The Post reported last week that Rivera has been bothered for a month by a condition that has turned his voice into a raspy whisper. He was scheduled to see a doctor for a second opinion earlier this week.

"Every time I talk it gets worse and worse," Rivera said last week at a charity function at his New York restaurant.

The Yankees have not commented on the future Hall of Famer's condition, since the issue is not baseball-related.

Rivera, who has one year left on his contract, speculated last week that 2012 could be his final season.

"I have one year left. I might call it over. I will know more in spring training," he said.

Rivera recorded 44 saves last season for the Yankees and for the eighth time in nine seasons had an ERA under 2.00.

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