Linebacker Paul Posluszny signed a four-year deal with the Buffalo Bills that could be worth more than $5 million yesterday, a day before the start of training camp.

Posluszny, the 34th pick overall, set a Penn State record with 372 career tackles in 44 games. In each of his last two seasons, he had 116 tackles and won the Bednarik Award as the nation's top defensive player. He also won the Butkus Award - given to the nation's top linebacker - in 2005.

He received $2.5 million in guaranteed money.

Buffalo also signed running back Dwayne Wright, a fourth-round pick out of Fresno State.

Veteran defensive tackle Darwin Walker still says he will refuse to report to the Bills because of a contract dispute. He was acquired in the trade that sent linebacker Takeo Spikes to the Eagles in March.

Walker will be sent back to the Eagles if a deal is not reached by Aug. 5. Buffalo then would receive a sixth-round draft pick from the Eagles.

"Nothing to report," agent Albert Irby said in an e-mail to the Associated Press. "Darwin will not report."

Bears. Pro Bowl linebacker Lance Briggs, who had threatened to sit out the season, agreed to a one-year, $7.2 million deal with the Chicago Bears as the team's franchise player.

The Bears also agreed to a four-year contract with second-round pick Dan Bazuin, a defensive end out of Central Michigan.

Titans. Tennesse agreed to terms with veteran receiver Eric Moulds, giving quarterback Vince Young another experienced target.

The 11-year veteran spent 2006 with Houston after playing for Buffalo in his first 10 NFL seasons. He has 732 catches.

Giants. Backup safety Jason Bell was placed on injured reserve by New York because of a back injury. Bell, who appeared in 15 regular-season games and a playoff game last season, aggravated his back during off-season conditioning.

Chiefs. Three-time Pro Bowl running back Priest Holmes will report to the Kansas City camp Saturday in a surprise development that comes 21 months after he was knocked out of football by a devastating hit. Neck and head trauma had kept Holmes on the sideline.

The return of the team's career leading rusher adds an interesting twist to the situation surrounding Pro Bowl running back Larry Johnson, who has vowed to hold out of camp until he gets a new contract.

Falcons. Atlanta said running back Warrick Dunn would miss three to four weeks after having back surgery.

Dunn, who rushed for a team-high 1,140 yards last year, hurt his back during off-season workouts and had the surgery Saturday.

Signings. The San Francisco 49ers agreed to a contract with running back Thomas Clayton, a sixth-round pick out of Kansas State. . . . The Raiders signed running back Michael Bush, one of Oakland's two fourth-round selections, from Louisville. . . . Michigan linebacker David Harris, the Jets' second-round pick, signed a four-year contract with New York.