According to a search warrant affidavit filed April 18 in Arizona District Court by the Internal Revenue Service, Grimsley talked with federal agents about an illegal supply line of amphetamines from Mexico.

He told them that "amphetamines also came from players on California teams that could easily go into Mexico and get them." He also "identified in his words, 'Latin players,' as a major source of amphetamines within baseball."

However, the most stunning revelation was about alleged drug use in the clubhouse.

He told agents that "'everybody had greenies. That's like aspirin.'… Grimsley stated that until last year, Major League clubhouses had coffee pots labeled 'leaded' and 'unleaded' for the players, indicating coffee with amphetamines and without."

Grimsley's statements have not been tested in court for their truthfulness nor has baseball comment on them.

The Grimsley raid represented an expansion of the BALCO case beyond the use of the steroids and human growth hormone. It was the first that bought alleged amphetamine use to the public spotlight.

In his interview with agents Grimsley identified several players as drug users. Their names have been blacked out on the affidavit, but that does not mean they have escaped the scrutiny of investigators.

U.S. Attorney Kevin Ryan of San Francisco said the government's investigation will "diligently follow the evidence."

"Clearly," he added, "we're not done."

Major League Baseball spokesman Rich Levin said the league was examining its response to the Grimsley affair and preparing for the possibility that other players might become targets of the investigation.

The league's goal, Levin said, is to rid the game of performance-enhancing drugs.

"It's a battle we continue to fight," he said. "We want to get them out of the game."

After the BALCO investigation, baseball toughened its testing program for performance-enhancing drugs and included testing for amphetamines for the first time this season.