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Much-traveled veteran quarterback J.T. O'Sullivan, who started eight games for the 49ers in 2008, has reached agreement on a two-year contract with the Bengals.

49ers coach Mike Nolan defined the role of Ted Tollner, naming the longtime NFL assistant as the team's new quarterbacks coach.

Still experiencing pain in his right shoulder, Alex Smith might be close to resolving the issue of how best to treat the injury, and that could include the possibility of not playing again in 2007.

Offensive tackle Joe Staley, the latter of San Francisco's two choices in the first round of the April draft, reached agreement in principle on a five-year contract with the 49ers on Monday.

Free-agent defensive lineman Sam Rayburn, released by the Eagles on May 11, on Tuesday afternoon reached a contract agreement with the 49ers.

The San Francisco 49ers signed cornerback Nate Clements and safety Michael Lewis on Friday, making two bold moves in the opening hours of free agency.

Donnie Henderson, fired as defensive coordinator of the Lions two weeks ago, will interview over the weekend for a similar position with the 49ers.

The San Francisco 49ers fired defensive coordinator Billy Davis on Wednesday after yielding an NFL-worst 412 points this season.

San Francisco center Tony Wragge has been fined $5,000 by the league for a late hit against Seattle cornerback Kelly Herndon in the 49ers' victory over the Seahawks last Thursday night.

Bobby Engram, who has not played since Oct. 1 because of a thyroid condition, will return to the field for Thursday night's game against the 49ers.

With their linebacker depth dwindling even as their victory total increases, the 49ers have added veteran insurance at the position, signing much-traveled free agent Hannibal Navies, who will be joining his fourth different team.

Niners defensive tackle Anthony Adams was fined $5,000 by the NFL for a hit last week on Chargers QB Philip Rivers.

The trade that sent Kevan Barlow to the Jets makes Frank Gore the top man in the 49ers' backfield.

Only one full day into training camp, the San Francisco 49ers have moved to strengthen their secondary, with ESPN.com learning that the team has reached a contract agreement with veteran safety Mark Roman, who was released by Green Bay.

Thirteen-year veteran punter Tom Rouen, released by the Seattle Seahawks last week, reached a contract agreement on Thursday with the San Francisco 49ers on a one-year deal and will compete in summer training camp with incumbent Andy Lee for the job.

Veteran free agent Moran Norris, a fullback whose modest statistics have typically belied his value as a lead-blocker, has signed a contract with the San Francisco 49ers.