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Roger Clemens' Trainer to Testify at Former Pitcher's Trial

Brendan Smialowski/Getty Images(WASHINGTON) -- The government's key witness in its trial against former major league pitcher Roger Clemens, who's accused of lying to Congress about his use of performance enhancing drugs, will testify Monday in a Washington, D.C. courtroom.

Clemens' former trainer Brian McNamee is expected to take the stand and say he injected the seven-time Cy Young Award winner with  steroids and human growth hormones.  McNamee saved the bloody gauze pads and needles he claims to have used on the pitcher.

Clemens has stated that the injections he received from McNamee were vitamin b12 and lidocaine.

Prosecutors intend to use McNamee's testimony and the evidence to prove Clemens lied to Congress.

The former pitcher was indicted in August 2010 on charges of obstruction of Congress, perjury and false statements.  He is accused of making the false statements to congressional investigators in a Feb. 5, 2008 deposition.  The perjury charges, meanwhile, arose from his Feb. 13, 2008, testimony before the House Oversight and Government Reform Committee.

Clemens insists he did not lie under oath.  His lawyers say McNamee is a liar and his evidence is tainted.

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