AP Sources: Grand Jury Looking at Clemens Case

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

Clemens' former teammate, Andy Pettitte, also has not received a subpoena. Pettitte corroborated some of McNamee's claims in a sworn statement to Congress.

Former New York Mets clubhouse attendant Kirk Radomski, sentenced to five years' probation last year after pleaded guilty to distributing steroids and laundering money, led investigators to McNamee.

McNamee told federal agents and baseball investigator George Mitchell that he injected Clemens more than a dozen times with steroids and HGH from 1998-01. Clemens' repeated denials of those accusations drew Congress' attention — and the former pitcher then made more denials under oath.

Clemens also filed a civil defamation suit against McNamee, a case pending in federal court in Houston.

Since the referral by Congress, federal investigators have been probing Clemens' past.

Shaun Kelley, owner of a Houston training center, said he had taken a polygraph test for FBI investigators John Longmire and Heather Young in April and that he had denied meeting Clemens or providing the pitcher or any of the pitcher's associates with illegal substances. Kelley said he employed Clemens' stepsister Bonnie Owens for about a year.

Kelley said neither he nor his lawyers had been contacted by the grand jury.

"It is just not fair for me, because they just come down here and throw me under the bus, and I lose half-a-million of business," Kelly said Monday in a telephone interview.

"I know in my heart I passed it," he said of the polygraph, "but the FBI is not known for admitting their mistakes."

Rep. Henry Waxman, the California Democrat who chaired the House committee that heard the testimony of Clemens and McNamee last year, declined to comment.