The judge also maintains discretion to reject any accord and satisfaction agreement under Virginia law.
Haynesworth did not appear in court Thursday.
Police say the alleged victim accused Haynesworth of punching him in January during a traffic altercation in Reston. The man told investigators he made a gesture at the driver of a pickup truck he thought was following too closely. The two vehicles stopped and the truck's driver, later identified as Haynesworth, got out of his pickup and allegedly punched the other driver.
Haynesworth's agent has said his client is innocent.
Haynesworth also is scheduled to go on trial in July for misdemeanor sexual abuse after he was accused of fondling a waitress at a hotel bar in Washington. He has pleaded not guilty.
Haynesworth is two years into a seven-year, $100 million contract with the Redskins, who signed him in 2009 to what was then an NFL record of $41 million in guaranteed money. But Haynesworth clashed repeatedly with coach Mike Shanahan and frequently skipped workouts. Shanahan suspended Haynesworth for the final four games of the 2010 season for conduct detrimental to the team.