WASHINGTON — Prosecutors said today that needles and cotton balls Roger Clemens’ former trainer says he used to inject the star pitcher tested positive for Clemens’ DNA and anabolic steroids — evidence the defense said was faked.

Assistant U.S. attorney Steven Durham revealed the results during opening arguments in Clemens’ trial on charges of lying to Congress about using performance-enhancing drugs. Clemens’ attorney Rusty Hardin responded that he won’t dispute the needles contain Clemens’ DNA and steroids, but accused trainer Brian McNamee of “mixing” it up.

“He manufactured this stuff,” Hardin told jurors. “Roger Clemens’ only crime was having the poor judgment to stay connected with Brian McNamee.”

Hardin said steroids would have been “incredibly inconsistent with his career and beliefs that there’s no way he would have done it.”

Clemens has said that the only things McNamee ever injected him with were the common local anesthetic lidocaine for his joints and vitamin B-12. But Durham said neither substance was found on the needles or cotton swabbed with his blood stains.