The Charlotte Hornets signed free agent guard Elliot Williams, the team announced Tuesday. 

Williams was the 22nd overall pick in the 2010 NBA Draft.

The 6-5 Williams has played in 104 games for the Trail Blazers, 76ers, Jazz and Pelicans with career averages of 5.1 points and 1.5 rebounds in 13.7 minutes. 

The Detroit Pistons signed Adonis Thomas to a contract, the team announced.

Thomas played for the Pistons' summer league team in Orlando.

The Boston Celtics have signed the 33rd overall pick in the 2015 NBA draft, Jordan Mickey, to a four-year, $5 million contract, league sources told RealGM.

Mickey’s deal contains two years guaranteed, sources said. The Celtics announced the signing on Monday. It marks the richest second-round deal in league history.

During the NBA Summer League in Las Vegas and Utah, Mickey averaged 12.3 points, 7.9 rebounds and 2.4 blocks in eight games — separating himself as one of Boston’s best young assets. The 6-foot-8 forward also shot 52.7 percent from the field while playing 28.1 minutes a game.

With the Celtcs, Mickey will earn the contract of a first-round selection.

Mickey declared for the NBA draft after his sophomore season at LSU, where he averaged 15.4 points and 9.9 rebounds per game.

The Miami Heat have signed center/forward Amar’e Stoudemire, the team announced.

“We are very fortunate that a proven All-Star like Amar’e has chosen the Miami Heat,” Pat Riley said in a statement. “He is going to bring gravitas, leadership and a hardworking mentality to our team as we look to win another Championship in Miami.”

Stoudemire played for the New York Knicks and Dallas Mavericks last season.