Greg Anderson, Barry Bonds’ friend and weight trainer, was sent to federal prison Wednesday after a judge found him in contempt of court for refusing to testify before a grand jury investigating the Giants star for perjury.

“Mr. Anderson, this is going to be a learning experience and probably one you won’t forget for a long time,” U.S. District Judge William Alsup said after ruling that Anderson had willfully refused to comply with a lawful order to testify.

“The marshals will take good care of you,” the judge said. “They’re not going to punish you. The purpose is to get you to change your mind.”

Anderson, 40, Bonds’ friend since boyhood and his weight trainer since 1998, will be incarcerated indefinitely at the Federal Correctional Institution in Dublin.
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