Now the latest is there's independent evidence as well as Pettitte and McNamee :

WASHINGTON — Roger Clemens will be confronted with a new and damaging affidavit from Andy Pettitte when he appears before the House Committee on Oversight and Government Reform on Wednesday, two lawyers familiar with the matter said late Tuesday as Clemens made final preparations to testify that he never took performance-enhancing drugs.

Clemens will also be asked about corroborating information that committee staff members developed on their own that ties Clemens to such drugs, the lawyers said. That information, they said, stands separate and apart from the assertions made about Clemens by his former personal trainer, Brian McNamee, who contends that he injected Clemens with steroids and human growth hormone from 1998 to 2001.

“The committee is not messing around and has other damaging evidence against Roger,” one of the lawyers said.
The other lawyer said, “Andy said enough to really hurt Roger.”

http://www.nytimes.com/2008/02/13/sp...13clemens.html