MLB.com's Bryan Hock reports that Mariano Rivera will undergo surgery on Friday that will remove polyps, which are small growths, from the closer's vocal cords.

"I don't like surgeries, but the sooner, the better," Rivera told Hoch. "I was worried about what caused it and what kind it is. Is it benign? I don't know. I'm [thinking] positive. We have to send it to the lab and hopefully it's a good thing."

Rivera will be unable to speak for a week.

Thanks Mr. Diaz for the tip.

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