By Will Yoder
May 01, 2012

Andy Pettitte has arrived in a Washington D.C. federal courtroom today and is expected to testify in the Roger Clemens perjury case, according to T.J. Quinn of ESPN.

Pettitte, a longtime friend and teammate of Roger Clemens, had previously been expected to testify after their former trainer, Brian McNamee.

Clemens is currently on trial for lying under oath about his use of performance enhancing drugs. Pettitte is testifying at the request of federal prosecutors who have asked him to speak about his own use of human growth hormone with the assistance of McNamee.

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