Former Miami Dolphins running back Ricky Williams, who filed retirement papers with the NFL this week, told Sports Illustrated that he'd only consider a comeback with the Oakland Raiders.

Williams, the NFL's leading rusher in 2002, told the magazine he might be interested in playing for the Raiders as early as the 2005 season. Raiders Coach Norv Turner was Williams's offensive coordinator in Miami the past two seasons.

"History would argue that most athletes that leave the game of football have second thoughts," Williams's agent, Leigh Steinberg, said. "It very well could occur with him."

Williams was in Oakland, Calif., over the weekend visiting his twin sister, Sports Illustrated said.

Williams, 27, told the Dolphins he was quitting because he's tired of the demands of professional football. Because the Dolphins retain his rights for the next two seasons, the team would have to trade or release Williams for him to play elsewhere.

If he returns to the NFL, Williams also would face a four-game suspension because he failed a third drug test for marijuana before retiring, the Miami Herald reported.

The Raiders aren't permitted to talk about a player under contract with another team, according to NFL rules. Oakland lost Charlie Garner (Stuart High) during the offseason, leaving Tyrone Wheatley, Justin Fargas, Troy Hambrick and Amos Zereoue competing for playing time at tailback.

* DOLPHINS: Chris Chambers has been Miami's top wide receiver for three seasons. Now he is getting paid like it.

Chambers signed a five-year contract extension worth $30 million. The deal includes $12 million in signing and roster bonuses.

"This is the type of player we want to invest in because we know what we are getting for our money," Dolphins General Manager Rick Spielman said.

Chambers caught 64 passes for 963 yards and had an AFC-leading 11 touchdowns last season. With running back Ricky Williams's retirement, the Dolphins expect Chambers to have an even bigger role this season.

* CHARGERS: Doug Flutie underwent arthroscopic knee surgery and will miss an estimated two weeks.

The 41-year-old quarterback had been bothered by soreness in his left knee and hadn't practiced since Saturday. He tried to return to training camp afternoon session Wednesday, but was pulled out when the pain returned.

"That kind of stuff just doesn't happen to him," said Drew Brees, currently the starter ahead of Flutie and unsigned rookie Philip Rivers. "He's just not used to that."

* PATRIOTS: Dana Stubblefield, a one-time defensive player of the year, signed with the team.

In 11 NFL seasons, the 33-year-old defensive tackle has played for San Francisco, Washington and Oakland, winning a Super Bowl ring with the 49ers in 1994. He was with the Raiders last season after a second stint with the 49ers.

The signing is in keeping with Coach Bill Belichick's policy of using veterans on a team that has won two of the last three Super Bowls. Stubblefield will be used to help fill the void caused when Ted Washington left as a free agent after last season and to help break in rookie nose tackle Vince Wilfork, the team's first draft pick.

* BEARS: Jerry Azumah, the Pro Bowl kick returner, will undergo neck surgery for a disk problem and will be sidelined three to four months, the team said.

Azumah, a starting defensive back, led the NFL in kickoff return average last season and ran two back for touchdowns.

Coach Lovie Smith said it was premature to discuss whether the injury was career-threatening.

"It's pretty early to say that when we say we're going to get him back in three to four months," Smith said. "It's tough when you don't know for sure, and now we know so we're moving forward."

* TITANS: Prosecutors said they will seek to drop drunken driving and gun charges against quarterback Steve McNair because a judge ruled two weeks ago that police didn't have sufficient cause to stop him.

District Attorney Torry Johnson said he decided not to appeal the July 22 decision by Judge Cheryl Blackburn that effectively eliminated all police evidence in the case, including a breath test that showed McNair was intoxicated.

Instead, Johnson will ask Blackburn to dismiss the case at a hearing today.

Oakland Coach Norv Turner coached tailback Ricky Williams for two years as offensive coordinator for Miami.