The suit, filed in Alameda County court, seeks damages for alleged battery and intentional infliction of emotional distress.

Romanowski instigated the fight Aug. 24 when he ripped off Williams' helmet and punched him in the face, breaking a bone around his left eye. The fracture put Williams on injured reserve -- ending his season before it began.

No criminal charges were filed, and Romanowski apologized publicly several days later.

On Thursday, Williams' agent said that was not enough.

"Seeing Bill's somewhat cavalier attitude in terms of apologizing after each incident and saying it wasn't going to happen again and never being taken to task for it was getting underneath Marcus' skin," agent Lee Kolligian said.

The 37-year-old Romanowski is known for fanatical behavior during his 16-year NFL career.

This was the latest physical episode involving Romanowski, who missed just one day of practice after the fight.

Romanowski has not played since a loss Sept. 22 in Denver because of a series of concussions. He was in Pittsburgh on Thursday being evaluated, Raiders coach Bill Callahan said.

A call to Romanowski's agent, Tom Condon, was not immediately returned.

Romanowski and Williams fought at the end of a running play during a 9-on-7 drill.

Williams, who played mostly on special teams last season, was taken to a local hospital for tests and has been seeing eye specialists since.

"Marcus Williams wants to continue as an Oakland Raider but this assault has put his future in doubt," said his lawyer, James Brosnahan, who recently lost a court case against the Raiders.

A jury in that matter decided that local officials he represented owed the franchise $34.2 million for luring it back from Los Angeles eight years ago on false promises of a packed stadium.

Brosnahan said that while Williams will lose playing time this year, "the big issue is whether he can come back and play" at all.