(WASHINGTON) -- Roger Clemens' former strength coach will take the stand again on Tuesday in the government's perjury trial against the former major league pitcher.
Clemens is accused of lying to Congress in 2008 about his use of performance enhancing drugs. The seven-time Cy Young Award winner was indicted in August 2010 on six counts of obstruction of Congress, perjury and false statements.
During his first day of testimony, Brian McNamee contradicted what Clemens told Congress, detailing to jurors the first time he injected the pitcher with steroids in the spring of 1998.
“Roger pulled down his pants, exposing his right buttocks," McNamee told the Washington, D.C., courtroom on Monday. "He bent his leg and started to flex his butt and said, ‘I'm ready. Just make sure there's no air bubbles in it, right?’”
“I injected him and plunged the fluid into his buttocks,” McNamee said. “It looked like it was a clean strike.”
The trainer went on to say that he injected Clemens eight to 10 more times that season.
On Tuesday, McNamee will continue his testimony, and will likely be due for an intense grilling when it comes time for cross-examination.
The lead defense attorney intends to portray the former strength coach as a liar -- an alcohol abuser who betrayed his boss for money and fame, and to escape criminal charges.
Copyright 2012 ABC News Radio