Grand Jury Explores Whether Clemens Lied to Congress

McNamee's lawyer, Richard Emery, said Monday his client has not been called as a grand jury witness or received a subpoena. But he does expect McNamee to testify again.

"We will be cooperating. We've been in contact with the federal authorities for a year and a half," Emery said, according to The Associated Press. "We look forward to the results, which we fully expect will show that Brian has been telling the truth all along."

Additional evidence for jurors to review could come from Radomski, a former New York Mets clubhouse attendant who was a source of the performance-enhancing drugs that McNamee provided to a number of players. In July, Radomski turned over to federal investigators an overnight shipping receipt for a package of two kits of HGH that he sent after the 2002 season, in care of McNamee, to Clemens at the pitcher's Houston home.

"The investigators knew from day one that I sent a package to Clemens's house," Radomski told ESPN.com last summer after discovering he still had the receipt. "They knew before the Mitchell report was released and before Brian went before Congress. So, this is nothing new to them.

"I just couldn't find the receipt."

Federal agents raided Radomski's Long Island home in December 2005, uncovering evidence that he supplied anabolic steroids and other drugs to pro baseball players. Radomski said he knew the performance-enhancing drugs sold to McNamee were intended for his baseball-playing clients, though he didn't inquire about their identities.

McNamee put himself in Clemens' crosshairs when he signed a proffer agreement with federal prosecutors, stipulating that he could not be charged with steroid distribution as long as everything he told the prosecutors was truthful. He also was asked to cooperate with the baseball-commissioned steroids investigation led by former Sen. George Mitchell, which made public McNamee's claims that he injected Clemens with steroids and growth hormone in 1998, 2000 and 2001.

Congress decided to hold its hearing after Clemens publicly challenged the veracity of the Mitchell report.

Clemens filed a defamation lawsuit against McNamee last January. McNamee's attorneys have since argued to have the suit thrown out; and last month, they filed a defamation suit on McNamee's behalf against Clemens.

Clemens is the latest professional athlete to come under federal scrutiny for statements made about alleged use of steroids or performance-enhancing drugs. Last year, the FBI opened an investigation into whether Houston Astros shortstop Miguel Tejada lied in 2005 when, during a congressional follow-up on testimony given by Rafael Palmeiro, he told House committee staff that he never took steroids or HGH.