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04/30/09 11:24 PM ET

Mientkiewicz refutes A-Rod allegations

Claims Rodriguez did not use steroids in high school

Recent accounts from excerpts in an upcoming book that Alex Rodriguez may have turned to steroids in high school were refuted Thursday by Dodgers utilityman Doug Mientkiewicz, who was a teammate of Rodriguez's at Westminster Christian High in Miami.

"There's no way," Mientkiewicz told Yahoo! Sports. "I was with him too much, I was with him for too long. Our team was together, like, 20 hours of the day. Every day."

Claims that Rodriguez was a possible steroid user as early as high school made headlines on Thursday when the New York Daily News reported that Selena Roberts' book, "A-Rod: The Many Lives of Alex Rodriguez," describes Rodriguez as having put on 25 pounds of muscle between his sophomore and junior years at Westminster High School.

The Warriors won the Florida state championship and were USA Today's top-ranked team during Rodriguez's junior year.

But Mientkiewicz, who graduated in 1992 and was a year older than Rodriguez, said the Yankees slugger naturally got bigger.

"He also grew two or three inches," Mientkiewicz said. "You're talking about a 15-year-old kid who looked really skinny and scrawny. Then he hit puberty and he grew into a man. Everybody goes through it. So now every 13-to-15-year-old kid is going to be accused of this, because he hits puberty?"

Rodriguez recently admitted he used steroids over a three-year period with the Rangers from 2001-03, but the book alleges he used steroids in a much longer time frame. The book alleges he not only took them in high school but also as a member of the Yankees.

"I understand the book is coming out and all," Mientkiewicz said. "Now we're going to go back to what he did in high school? You weren't there. He was with me in high school. In high school he was more dedicated than anybody I'd ever seen. Can we move forward please?"

Mientkiewicz said he's not happy with his former high school teammates and the way they have handled the situation.

"If you're going to say something about it, don't be a coward," he said. "Put your name on it. Face the music."

Rhett Bollinger is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.