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02/09/12 3:45 PM EST

Boyd admits to pitching after using cocaine

BOSTON -- Dennis "Oil Can" Boyd said in an interview with WBZ NewsRadio in Boston that he pitched under the influence of cocaine in two-thirds of his Major League starts.

Boyd, 52, spent 10 seasons in the big leagues, and eight of those were with the Red Sox. Overall, he went 78-77 with a 4.04 ERA.

"I never had a drug test as long as I played baseball," Boyd said. "I was told that, 'Yeah, if you don't stop doing this, we're going to put you into rehab.' And I told them ... 'I'm going to do what I have to do. I have to win ballgames. We'll talk about that in the offseason. Right now, I have to win ballgames.'"

Boyd has an autobiography that is scheduled to be released in June.

Evan Drellich is a reporter for MLB.com. Follow him on Twitter @EvanDrellich. This story was not subject to the approval of Major League Baseball or its clubs.