Clemens perjury trial recap: July 5

Charges: Roger Clemens has been charged with perjury, false statements and obstruction of Congress for telling a House committee under oath that he never used steroids or human growth hormone during his 23 seasons in Major League Baseball.

Consequences: The seven-time Cy Young winner could face prison time if the trial’s 12 jurors unanimously agree that he lied under oath and convict him. The maximum sentence Clemens could receive for the six charges would be 30 years in prison and a $1.5 million fine.

What happened today: A day before Clemens’ perjury trial is to begin in Washington, D.C., the federal judge presiding over the case said he will likely not allow the pitcher’s former Yankee teammates to testify. US District Judge Reggie Walton said statements from Andy Pettite, Chuck Knoblauch and Mike Stanton that they were injected with performance-enhancing drugs by trainer Brian McNamee could unfairly influence the trial’s jurors.

What it means: Details from Pettite, Knoblauch and Stanton about their past drug use with the Yankees could have been used as key evidence for the prosecution. McNamee, who once served as Clemens’ trainer, still remains an important witness for the prosecution.

Quote: "Clemens is the ultimate loose cannon, and unfortunately for Clemens, his lawyer is an enabler. When your client is driving himself off a cliff, you don’t push the accelerator down.” — Peter Keane, dean emeritus of the Golden Gate University School of Law in San Francisco

Our guy on the scene:’s A.J. Perez says that despite not having a defense as strong as Barry Bonds did for his own perjury trial, Clemens is remaining defiant about his alleged use of performance-enhancing drugs.

What’s coming up next: Jury selection begins Wednesday. The trial is expected to last four to six weeks.