Baseball star Roger Clemens will sit before U.S. lawmakers tomorrow, attempting to fight off charges from his former trainer Brian McNamee that he took forbidden drugs.

Congressional representatives from the Committee on Oversight and Government Reform in Washington D.C. will probe the use of performance-enhancing drugs in baseball, including steroids and Human Growth Hormone.

The hearing comes two months after an investigation from Major League Baseball conducted by former Sen. George Mitchell which laid bare many of the accusations of PED use in the sport.

Clemens, one of baseball's all-time great players and not previously known as a PED user, was the most significant figure listed in the report among dozens of other players.

Since then the former Yankee, his lawyers and lawyers for McNamee have lobbed accusations back and forth in an attempt to undermine the credibility of the other. There is a pending lawsuit in U.S. District court by Clemens alleging that McNamee defamed him with the comments.

Major league baseball