The Miami Heat have reassigned longtime assistant coaches Ron Rothstein and Bob McAdoo.

Rothstein and McAdoo will no longer play significant roles on Erik Spoelstra's staff and could leave the bench altogether.

It is immediately unclear what role Rothstein and McAdoo will have in the organization, but both are expected to continue to have jobs with the Heat, league sources said.

David Fizdale has become the top assistant in recent seasons, while Juwan Howard will be promoted from his role in player development.

Nazr Mohammed worked out and met with the Miami Heat on Thursday.

The Heat are searching for another backup big man.

Among available centers, the Heat are most intrigued by Emeka Okafor, who is still rehabiliating a back injury.

Mohammed spent the past two seasons with the Chicago Bulls.

Leandro Barbosa has agreed upon a one-year deal with the Golden State Warriors for the veteran minimum.

Barbosa played 20 games last season with the Phoenix Suns.

Barbosa received initial interest from the MIami Heat as well.

The Miami Heat have signed guard Shannon Brown.

Brown signed a one-year contract.

Brown, an eight-year NBA veteran, has appeared in 403 career NBA regular season games (58 starts) and averaged 7.7 points, 1.9 rebounds, 1.1 assists and 18.0 minutes while shooting 42 percent from the field, 33.1 percent from three-point range and 80.7 percent from the foul line. He split the 2013-14 season between the San Antonio Spurs and New York Knicks.

Brown won back-to-back NBA Championships with the Los Angeles Lakers in 2009 and 2010.

The Heat's roster now stands at 16.

Emeka Okafor has received interest from the Cleveland Cavaliers and Miami Heat among roughly half of the NBA's teams, according to sources.

Okafor, however, is unlikely to sign with a team until midseason as he continues to heal from a herniated disk.

"He'll be in high demand when he's back," one source said.

Okafor suffered his injury during preseason last year and was subsequently dealt from the Washington Wizards to the Phoenix Suns.

Shawn Marion has committed to sign with the Cleveland Cavaliers.

Marion also received interest from the Los Angeles Clippers, Indiana Pacers and Miami Heat.

The Cavaliers could only offer Marion a veteran's minimum deal, but the chance to play alongside LeBron James and compete for a title clinched his decision.

Marion met with Larry Bird earlier this week and could offer more money, but the Pacers would only spend as much on him using their Paul George injury exception as would be allowed while staying under the tax.

The Los Angeles Clippers have expressed interest in signing Shawn Marion.

Marion has met recently with the Cleveland Cavaliers and Indiana Pacers, but remains unsigned.

The Miami Heat also remain interested in Marion.

Indiana prosecutors have formally charged Greg Oden with battery for allegedy punching his ex-girlfriend in the face during a fight.

Oden was charged on Monday with felony battery that resulted in serious bodily injury, misdemeanor domestic battery and misdemeanor battery resulting in serious bodily injury.

Oden, a former No. 1 overall draft pick, played for the Miami Heat last season.

Ray Allen will wait until September before deciding if he will continue his NBA career for a 19th season.

Allen has been linked with joining LeBron James with the Cleveland Cavaliers.

"It's August and I don't want to rush to judgment," Allen said Friday night at the seventh annual Jim Calhoun Charity All-Star Classic. "I want to get to September and see how I really feel."

Allen averaged 26 minutes and 9.6 points per game off the bench last season.

Free agent swingman Reggie Williams has agreed to a one-year contract with the Miami Heat, a league source told RealGM.

Williams held discussions with NBA teams in free agency, and his agents, Herb Rudoy and Ronald Shade, finalized the deal with the Heat on Thursday.

Williams spent the majority of the 2013-14 season with the Tulsa 66ers of the Development League and received multiple call-ups to the Oklahoma City Thunder. He scored 11 points in over 16 total minutes last season for the Thunder.

Williams has played parts of five seasons in the NBA, averaging 8.5 points and 37 percent three-point shooting with three teams. He scored 15.2 points per game in a call-up with the Golden State Warriors four years ago.

Yahoo! Sports first reported that Williams was nearing an agreement with Miami.