Ben Wallace

On August 11, 1999, Wallace was traded to the Orlando Magic in a multiplayer deal for Isaac Austin. In the 1999–2000 season, he solidified his role as a starter, starting in all 81 games that he appeared in. He averaged 4.8 points, 8.2 rebounds and 1.6 blocks for the Magic as they won 41 games. However, the Magic failed to make the playoffs and following the season, the Magic traded Wallace along with Chucky Atkins to the Detroit Pistons as compensation in a sign-and-trade deal for superstar forward and free agent Grant Hill.

Despite the disappointing Finals' loss, the Pistons returned with a vengeance in the 2005–06 season, with Wallace winning another consecutive Defensive Player of the Year Award, a fifth straight selection to the All-Defensive First Team and another selection to the All-NBA Third Team. He was named an All-Star for the fourth straight season, and led the league in total offensive rebounds with 301. Detroit was dominant throughout the season, winning 64 games and earning the top seed in the conference. The playoffs featured a dominating win over Milwaukee in the first round followed by a grueling 7 game series win against the young Cleveland Cavaliers led by All-Star forward LeBron James. This set up a conference finals rematch with Miami, who had retooled their roster in the off-season. The Pistons struggled throughout the series with the impressive play of Dwyane Wade, who dominated offensively on the way to a 4–2 victory. Miami would go on to win that year's NBA title. Wallace's production fell significantly as compared to previous seasons in the playoffs, as he only averaged 4.7 points per game, 10.5 rebounds and just 1.2 blocks. In the off-season, he would test free agency and eventually signed with the younger Chicago Bulls, thereby ending an era of Detroit Pistons basketball which had relied on him as a defensive and rebounding anchor. In each of the five years that the Pistons made the playoffs with Wallace, Detroit allowed the fewest points per game out of all 16 playoff teams. The same year, Wallace had altercation with Flip Saunders during in Game 6 of the Eastern Conference Finals, that drew him even further away from re-signing with the team by the controversy decision of bench him out the whole fourth quarter in that game. Without Wallace, the Pistons fell to third in points per game allowed in the 2007 and 2008 playoffs.

The Cavaliers already featured Zydrunas Ilgauskas as the team's starting center, so coach Mike Brown moved Wallace to the power forward position. Wallace played in 22 regular season games (all starts) and averaged 4.2 points, 7.4 rebounds and 1.7 blocks per game. Wallace had a Cavalier regular season high of 12 points on February 24, 2008, against the Memphis Grizzlies, and had regular season Cavaliers' highs of 15 rebounds against the Charlotte Bobcats and four blocks against the Orlando Magic. In the playoffs, Wallace played in 13 games (all starts) and averaged 3.2 points, 6.5 rebounds and 1.1 blocks per game. He had his playoff high of 12 rebounds in Game 4 win against the Washington Wizards in the first round of the playoffs as the Cavaliers swept the Wizards. The following series would be against the resurgent Boston Celtics. The series would go to seven games, with the Celtics winning the final game at home and Wallace failing to register double figure rebounds in the series.

Even in limited minutes, Wallace had a significant impact on the Cavaliers' defense. Prior to Wallace's first game with the Cavaliers against the Memphis Grizzlies, Cleveland had allowed 98.2 points per game through 55 games. After acquiring Wallace, Cleveland's defense finished the season allowing 96.7 points per game, the ninth best mark in the league. In the 2008 playoffs, the Cavaliers' defense greatly improved, holding opponents to 87.8 points per game and posting a Defensive Rating of 102.1. The Cavaliers ranked first among all 16 teams in both defensive categories for the playoffs, ahead of even the Celtics led by Kevin Garnett, the Defensive Player of the Year.

On June 25, 2009, Wallace was traded to the Phoenix Suns with Sasha Pavlović, a second-round draft pick and $500,000 for Shaquille O'Neal. On July 13, 2009, the Suns bought out Wallace's $14 million contract, saving $8 million in the process. Wallace actually received $10 million but Phoenix was in luxury tax so the savings were effectively doubled.

On August 7, 2009, Wallace agreed to re-sign with the Pistons as a free agent to a one-year deal. He formerly wore jersey number 3 with the Pistons, but changed his jersey to No. 6 upon his return, allowing Rodney Stuckey to keep that number. On July 11, 2010, Wallace agreed to a two-year deal with the Pistons.

On August 4, 2010, Wallace was re-signed by the Pistons. On November 30, 2010, in a 90–79 road loss to the Orlando Magic, Wallace surpassed the 10,000-rebound mark for his career, becoming the 34th player in NBA history to achieve that mark.

On December 22, 2010, in a 115–93 road win over the Toronto Raptors, Wallace played his 1,000th game becoming the 95th player in NBA history to achieve this record. On February 14, 2012, Wallace played his 1,055th game, surpassing the record held by Avery Johnson for most games by an undrafted player.

In 2011, Wallace was arrested and charged with DWI and carrying a concealed weapon. He was sentenced to a year of probation.

In March 2014, Wallace was sentenced to a year of jail, with all but two days suspended, after he pleaded guilty to leaving the scene of an accident in Richmond, Virginia on February 8, 2014.

On January 16, 2016, the Pistons retired Wallace's No. 3 jersey.

On May 17, 2018, Wallace joined the NBA G League's Grand Rapids Drive as an ownership partner.