Brian McNamee, a former trainer of pitcher Roger Clemens, told federal law enforcement officials that the seven-time Cy Young winner developed an abscess in his buttocks around the time McNamee alleges he was injecting him with steroids in 1998, a lawyer with knowledge of the case told The New York Times.

But three members of the Toronto Blue Jays organization -- which the pitcher was playing for at the time -- including two trainers, said they did not recall Clemens having an abscess, the Times reported.

According to the newspaper, any injection can lead to an abscess, but it's more likely to occur when injecting steroids.

In the Mitchell Report, a document put together by former Sen. George Mitchell detailing the use of steroids in Major League Baseball, McNamee alleges that he repeatedly injected Clemens with steroids. But the former Yankee denied the accusations, saying that McNamee only injected him with vitamin B-12 and a painkiller, lidocaine.

"It is far less likely that any injection of vitamin B12 or lidocaine, which is usually not injected deep into the body, would have created an abscess," said Dr. Gary I. Wadler, a member of the World Anti-Doping Agency, according to the Times. "Steroid users tend to repetitively inject the drug deep into the muscle and this has been associated with the development of sterile abscess."

McNamee's attorney said his client believes the treatment of Clemens' abscess was detailed in his medical or training records, and that he will testify that the pitcher had an abscess when he is called before Congress on Feb .13.

Clemens, Yankee pitcher Andy Pettitte and former New York infielder Chuck Knoblauch have also been called to testify before the House Committee on Oversight and Government Reform next month.