Prosecutors came at Barry Bonds with a series of high, inside fastballs Wednesday.

Bonds, baseball's career home run leader, tested positive for steroids three times in 2000 and 2001, according to hundreds of documents filed by the government that were released Wednesday.

Prosecutors said a urine test supplied by Bonds also tested positive for performance-enhancing substances in 2003, which was part of an anonymous program that baseball conducted in 2003.

That information likely will be at the crux of the government's case against Bonds, who is scheduled to go on trial for perjury charges on March 2.

Bonds is scheduled to be tried on 10 counts of perjury and one count of obstruction of justice related to his BALCO grand jury testimony.

Bonds testified to a federal grand jury in 2003 that he used the "cream" and the "clear" but did not know that they were performance-enhancing drugs. The urine samples could prove the existence of other steroids in his body.

During testimony, Bonds said he never took steroids. The government alleges that Bonds lied under oath and that at least two of his positive tests stemmed from injections of steroids.

Bonds steadfastly denied during his testimony that he has been injected by his former personal trainer, Greg Anderson.

Bonds will be arraigned Thursday, after which his lawyers will be looking to exclude much of the government's evidence. In a motion filed last week, Bonds' attorneys asked U.S. District Judge Susan Illston, who is presiding over the perjury case, to suppress several pieces of evidence, including those 2003 urine samples.

According to the New York Times, Bonds had provided samples that did not test positive under baseball's drug-testing program, but those samples were retested by federal authorities after they seized them in a 2004 raid.