The Miami Heat, San Antonio Spurs, Los Angeles Clippers, Atlanta Hawks and New York Knicks are pursuing free-agent forward Kenyon Martin, according to league sources.

Martin has spoken with executives from each of the clubs and is hoping to make his decision next week.

Martin signed a $2.6 million deal with Xinjiang during the lockout, but left the team in late December in hopes of returning to the NBA.

The Atlanta Hawks today requested waivers on rookie guard Donald Sloan.

Sloan, who signed with Atlanta on December 9, 2011, appeared in five games, averaging 1.2 ppg, 1.0 rpg and 1.0 apg in 4.0 mpg (.375 FG%, 0-1 3FGs).

The Warriors play zone 10.3% of the time, followed by the Bobcats (9.3%) and Raptors (7.5%), according to Synergy Sports, which tracks every NBA play and provides in-depth statistical analysis.

The Hawks face zone defenses the most, on 9.2% of their possessions, followed by the Heat (8.8%), Bobcats (8.3%) and Thunder (7.5%).

It's no coincidence the Heat and Thunder face zones.

"Those might be the two most athletic teams," TNT analyst Steve Kerr said.

Hawks general manager Rick Sund said the team hadn’t yet decided if it would seek to sign a free-agent center to fill in for Al Horford, who suffered a torn left pectoral muscle and is expected to return near the end of the regular season.

“We’ll sit down the next three of four days and talk it over to see if there’s anything we want to do,” Sund said. “Do we want to go with the status quo, or how do we want to do it.”

For now the Hawks will push forward with All-Star guard Joe Johnson and talented power forward Josh Smith as their main cogs.

“We still have enough talent to be an elite team in the East,” Johnson said. “We understand one man can’t do it all. We have to trust each other. We have to muster up a little more to make up for what we’ve lost.”

Al Horford is expected to miss three to four months with a torn left pectoral muscle, according to a source.

Horford sustained the injury in the first half of Wednesday's game.

“We are very disappointed for Al and our team and we wish him the best as he moves forward in the rehabilitation process,” said Hawks’ Executive Vice President and General Manager Rick Sund in a statement. “He has contributed greatly to our success since his arrival in Atlanta, and that’s evident by his selection to the NBA’s All-League team last season (third team pick).”

The NBA announced the 2012 All-Star Ballot on Wednesday.

The 120 players on the ballot were selected by a panel of media who regularly cover the NBA: Bill Simmons (Grantland), Sekou Smith (NBA.com), Doug Smith (Toronto Star/PBWA), and Ian Thomsen (Sports Illustrated). 

The following is a team-by-team list:

Atlanta (4): Joe Johnson, Al Horford, Jeff Teague, Josh Smith

Boston (5): Rajon Rondo, Ray Allen, Paul Pierce, Kevin Garnett, Brandon Bass

Charlotte (4): D.J. Augustin, Kemba Walker, Boris Diaw, Corey Maggette

Chicago (5): Derrick Rose, Joakim Noah, Carlos Boozer, Luol Deng, Richard Hamilton

Cleveland (3): Kyrie Irving, Antwan Jamison, Anderson Varejao

Dallas (5): Dirk Nowitzki, Lamar Odom, Shawn Marion, Jason Kidd, Jason Terry

Denver (5): Ty Lawson, Arron Afflalo, Andre Miller, Nene, Danilo Gallinari

Detroit (4): Greg Monroe, Rodney Stuckey, Jonas Jerebko, Tayshaun Prince

Golden State (3): Stephen Curry, Monta Ellis, David Lee

Houston (4): Kyle Lowry, Kevin Martin, Luis Scola, Samuel Dalembert

Indiana (6): David West, Danny Granger, Tyler Hansbrough, Roy Hibbert, Paul George, Darren Collison

L.A. Clippers (4): Blake Griffin, Chris Paul, Chauncey Billups, DeAndre Jordan

L.A. Lakers (4): Kobe Bryant, Pau Gasol, Andrew Bynum, Metta World Peace

Memphis (4): Zach Randolph, Marc Gasol, Rudy Gay, Mike Conley

Miami (4): LeBron James, Dwyane Wade, Chris Bosh, Joel Anthony

Milwaukee (3): Andrew Bogut, Brandon Jennings, Stephen Jackson

Minnesota (3): Kevin Love, Michael Beasley, Ricky Rubio

New Jersey (3): Deron Williams, Kris Humphries, Anthony Morrow

New Orleans (4): Eric Gordon, Carl Landry, Chris Kaman, Emeka Okafor

New York (3): Carmelo Anthony, Amar’e Stoudemire, Tyson Chandler

Oklahoma City (5): Kevin Durant, Russell Westbrook, James Harden, Serge Ibaka, Kendrick Perkins

Orlando (4): Dwight Howard, Jameer Nelson, Jason Richardson, Hedo Turkoglu

Philadelphia (5): Jrue Holiday, Thaddeus Young, Andre Iguodala, Elton Brand, Spencer Hawes

Phoenix (3): Steve Nash, Grant Hill, Marcin Gortat

Portland (6): LaMarcus Aldridge, Wesley Matthews, Raymond Felton, Gerald Wallace, Marcus Camby, Nicolas Batum

Sacramento (3): Tyreke Evans, DeMarcus Cousins, Marcus Thornton

San Antonio (3): Tim Duncan, Tony Parker, Manu Ginobili

Toronto (3): Andrea Bargnani, DeMar DeRozan, Jose Calderon

Utah (4): Derrick Favors, Al Jefferson, Paul Millsap, Devin Harris

Washington (4): John Wall, Nick Young, JaVale McGee, Andray Blatche

Tracy McGrady scored 11 of his 16 points in the fourth quarter of the Hawks' 100-92 win over the Heat on Monday.

“It feels good,” McGrady said. “It’s been a long time since I’ve had that feeling. My legs feel fresh. Everything just feels good. It feels right. That’s a good sign. I haven’t felt this good in a long time, probably since the beginning of my knee injury.”

McGrady relished the opportunity of playing against LeBron James and Dwyane Wade.

“I’m a competitor, especially competing against the best, LeBron and D-Wade,” he said. “I’m always up for the challenge. Those guys, it brings the best out of you. It felt pretty good.”

Pape Sy has returned to France and will place for Gravelines-Dunkerque.

Sy was waived by the Hawks and didn't receive another contract offer.