Drug paraphernalia that Brian McNamee says he used to inject pitcher Roger Clemens has performance-enhancing substances on it, according to people briefed on the case, who were quoted anonymously in The New York Times on Tuesday.

McNamee has said he used syringes, vials and gauze pads to inject Clemens with steroids and human growth hormone in 2000 and 2001. McNamee said he kept the items in a FedEx box in his basement.

A grand jury is investigating whether Clemens perjured himself in front of Congress when he denied using performance-enhancing substances.

Clemens said McNamee did inject him, but the substances were vitamin B-12 and lidocaine, which is a painkiller.

"I assumed, and I am not surprised, that the tests were positive for both DNA and for performance-enhancing drugs, because that's what Brian said all along, and there's not much doubt that Brian's been telling the truth," McNamee's lawyer, Richard Emery, told The Associated Press. "The confirmation of that fact, once again, just seems to me to be another significant step towards jail for Clemens."

Clemens' attorney, Rusty Hardin, told The Times he wasn't surprised at the report. "Do you really think McNamee was going to fabricate this stuff and not make sure there were substances on there? The fact is Roger never used steroids or HGH," Hardin said.