Jermaine O'Neal to Celtics; Turiaf to Knicks

Boston Celtics general manager Danny Ainge confirmed that the Celtics have agreements in place with Paul Pierce and Ray Allen that would keep Boston's new Big Three intact for a run at a third NBA finals in four years.

Ainge also said he expects to sign free agent center Jermaine O'Neal to fill in while center Kendrick Perkins recovers from knee surgery.

"We intend to sign him," Ainge told reporters. "Our priorities to start the offseason were obviously Paul, Ray, and to strengthen our center position in light of Perk's injury."

• The agent for David Lee said the All-Star forward is heading from the New York Knicks to the Golden State Warriors in a sign-and-trade deal.

Mark Bartelstein said Lee will get a six-year, $80 million contract. The Knicks will receive forwards Anthony Randolph, Kelenna Azubuike and former Gonzaga standout Ronny Turiaf.

• Center Brendan Haywood agreed to a $55 million, six-year contract to return to the Dallas Mavericks, according to a person familiar with negotiations.

• Rudy Gay inked an $82 million deal to stay with the Memphis Grizzlies, the only team the four-year NBA veteran has known. More than 150 fans attended the signing ceremony, a show of the optimism for a Grizzlies team with five starters returning from last season.

• Guard Steve Blake signed a four-year contract worth $16 million from the Los Angeles Lakers.

• The Oklahoma City Thunder acquired the draft rights to Cole Aldrich and veteran forward Morris Peterson from the New Orleans Hornets in exchange to the draft rights to Craig Brackins and Quincy Poindexter.