Raiders coach Bill Callahan said Williams' left orbital bone was broken and his nose was injured. The seldom-used backup tight end will be out four-to-six weeks.
Though Williams reportedly called Alameda police after the incident, no criminal charges have been filed over the scuffle, which occurred during a practice drill. Callahan doesn't expect charges to be pressed.
``It doesn't matter who it is,'' Callahan said. ``When it gets to that severity, I'm going to level a discipline. It goes beyond the game. Once it's beyond the respect and dignity of a player, it's a tragedy.''
Williams underwent several tests at a local hospital before being released Sunday night. Callahan reportedly met with Romanowski on Monday night after practice. Romanowski was not available for comment.
But Romanowski has a long history of violent scrapes with opponents and others. One of his more well-publicized incidents came in December 1997, when he spit in the face of San Francisco 49ers receiver J.J. Stokes while playing for the Denver Broncos in a nationally televised game.
Romanowski was fined $7,500 by the NFL -- one of several fines for his behavior during his career.Williams is in his second year with Oakland after playing in 13 games as an undrafted free agent last season. He played primarily on special teams last season, but was trying to earn a more regular position this year.