New York — Brian McNamee gave federal prosecutors syringes and other physical evidence his lawyers say back the personal trainer's allegations of drug use by Roger Clemens, who returns to Capitol Hill today in hopes of rebutting the accusations.

Clemens, who gave a deposition Tuesday, is scheduled to hold one-on-one meetings with members of the House Committee on Oversight and Government Reform, two people familiar with the plans said, speaking on condition of anonymity because no announcement was made.

Among the members Clemens is to meet with is Rep. Tom Davis, the committee's ranking Republican, one of the people said. Committee chairman Henry Waxman is not scheduled to meet with Clemens.

McNamee is due to meet with committee staff Thursday morning to give his own deposition, and his legal team said it will bolster his story with details of the evidence.

His side turned over gauze pads and syringes they said had Clemens' blood to IRS Special Agent Jeff Novitzky in early January, a person familiar with the evidence said, speaking on condition of anonymity because McNamee's lawyers did not want to publicly discuss details. The syringes were used to inject Clemens with steroids and human growth hormone, the person said. A second person, also speaking on condition of anonymity, said the evidence was from 2000 and 2001.

“I think this is a significant point in the case. We believe that this is significant corroboration,” said McNamee's lead lawyer, Earl Ward.

Lanny Breuer, one of Clemens' lawyers, called McNamee's allegations “desperate smears” and said the trainer “apparently has manufactured evidence.”

“It is just not credible,” Breuer said in a statement. “Who in their right mind does such a thing?”

In December's Mitchell Report on doping in baseball, McNamee said he injected Clemens 16 times with performance-enhancing drugs in 1998, 2000 and 2001.

Richard Emery, another of McNamee's lawyers, said the committee will be given a description of the evidence that was turned over to prosecutors.

“It does change the nature of the case from a he-said, she-said to something about physical evidence,” Emery said.

Doping expert Don Catlin said steroids still could be detected in a sample that old.

“But if you don't find it, it doesn't mean it wasn't there before,” said Catlin, who added there are sure to be chain of custody issues.

He said HGH would be much less stable.

After his five-hour sworn deposition Tuesday, Clemens said that he again denied using performance-enchancing drugs.

By denying under oath that he used performance-enhancing drugs, Clemens put himself at legal risk if prosecutors determine his testimony wasn't truthful.

Keith Ausbrook, the committee's Republican general counsel, told The Associated Press the committee was not aware that such physical evidence existed.

McNamee, the former personal trainer for Clemens and Yankees pitcher Andy Pettitte, also told former Senate majority leader George Mitchell that he injected Pettitte with HGH.

Emery said McNamee's legal team planned to hold a news conference following their client's deposition in Washington today.

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