The anchor of the Mavericks defense now centers one of the NBA's best frontcourts.

Tyson Chandler joined the New York Knicks Saturday, in the belief that joining Carmelo Anthony and Amar'e Stoudemire means he's not done competing for the title he won last season with Dallas.

Chandler gets a four-year contract worth about $56 million after coming to the Knicks via sign-and-trade as part of a three-team deal. The Knicks sent Ronny Turiaf and cash to the Washington Wizards and reserve guard Andy Rautins to the Mavericks, with other picks involved.

The Knicks also waived point guard Chauncey Billups and designated him as their amnesty player so his $14.2 million salary wouldn't count for salary cap or luxury tax purposes and they could afford Chandler.

The 7-foot-1 Chandler helped the Mavericks win the NBA championship last season, averaging 10.1 points and 9.4 rebounds.

Howard requests trade

The Magic's Dwight Howard wants out of Orlando, putting one of the NBA's most dominant big men on the block at the start of training camp.

Magic general manager Otis Smith confirmed Saturday that Howard has formally requested a trade. A team spokesman said earlier in the day that the team had granted New Jersey, Dallas, and the Los Angeles Lakers permission to talk to Howard's agent, Dan Fegan, to discuss possible trades.

The all-star is eligible to opt out of his contract in July 2012.

Smith said there was no timetable or deadline for a trade.

Hornets try new Paul deal

ESPN.com reports that sources close to the talks say the New Orleans Hornets' three-team trade with the Los Angeles Lakers and Houston Rockets that would land Chris Paul in Los Angeles has been resubmitted to the league office for approval.

Initially, the Rockets' part of the deal was exactly the same, with Houston sending Luis Scola, Kevin Martin, and a 2012 first-round draft pick to New Orleans, while receiving Pau Gasol from the Lakers, according to sources.

But sources close to the process told ESPN.com on Saturday afternoon that the Rockets have added unspecified players to the trade construction at the Hornets' request. The Rockets are prepared to make further tweaks, sources said, but have thus far been advised not to make any additional changes.

Sources told ESPN.com that a reconfigured trade has been presented by the league-owned Hornets to NBA commissioner David Stern in hopes that he'll approve this deal after vetoing Thursday's trade.

Signings

The Atlanta Hawks have signed 10-year veteran forward Vladimir Radmanovic. . . . The Toronto Raptors signed veteran free-agent forward Rasual Butler. . . . The Sacramento Kings signed free agents Lawrence Hill and Adrian Oliver, bringing the training camp roster to 15 players.

The Indiana Pacers re-signed veteran center Jeff Foster and signed free agent forward/center Jeff Pendergraph along with D-League players Jarrid Famous, Tyren Johnson, Darnell Lazare, and Matt Rogers.

The Golden State Warriors signed free agent forwards Gary Flowers and Chris Wright and guard Edwin Ubiles.

The Miami Heat signed forward Derrick Byars, guards Cameron Jones, Jeremy Wise, and Terrel Harris, and center Mickell Gladness.

The Detroit Pistons signed guard/forward Damien Wilkins.