Barry Bonds' personal surgeon Dr. Arthur Ting is expected to be called by the government to testify against the slugger in his perjury and obstruction of justice case, according to a motion filed by the U.S. Attorney's office in Northern California. The motion also suggests that two of Bonds' lawyers have potential conflicts of interest because they represented people who testified previously before the grand jury investigating the Bay Area Laboratory Co-Operative (BALCO). A hearing on the motion is scheduled for Friday. Bonds is expected to attend and waive the potential conflict. Bonds was indicted Nov. 15 on four counts of perjury and one count of obstruction of justice. Surrounded by a legal team of a half-dozen attorneys, the seven-time Most Valuable Player pleaded not guilty at a Dec. 7 hearing. It had been expected that Ting would be a witness, but this is the first the time the government has acknowledged the surgeon is likely to testify in the case against his client. It's unclear what information Ting could provide.