Barry Bonds has entered a not guilty plea in California to charges he lied to federal investigators about whether he used performance enhancing drugs.
Last month, Bonds was indicted on four counts of perjury and one of obstruction of justice. Today's arraignment was his first public appearance since being indicted.
If he's convicted of all five charges Bonds could spend more than two years in prison.
Prosecutors allege Bonds repeatedly lied when he testified under oath that he never knowingly used performance enhancing drugs.
Several former associates of Bonds are expected to contradict that testimony, and prosecutors claim to have a blood test from November 2000 that shows a "Barry B" testing positive for two types of steroids.
Bonds and his wife had to wade through a crush of television cameras and reporters just to get inside the courthouse, where he went through the metal detectors and waved to the crowd.