Atlanta Hawks (2004–2013) Smith was selected by the Atlanta Hawks with the 17th overall pick in the
2004 NBA draft. He won the
NBA Slam Dunk Contest his rookie year during the 2005 NBA All-Star Weekend. He became only the fifth player to record three perfect scores in the same contest along with
Jason Richardson,
Vince Carter,
Spud Webb, and
Michael Jordan. Smith averaged 9.7 points, 6.2 rebounds and 1.95 blocks per game for the
2004–05 season and was selected to the NBA All-Rookie Second Team. On March 3, 2007, Smith broke the 500 career block mark, making him the youngest player to do so in NBA history. He ended the
2006–07 season with averages of 16.4 points, 8.6 rebounds, 3.3 assists, 1.4 steals and 2.9 blocks per game. On November 17, 2007, Smith scored a career-high 38 points on the road against the
Milwaukee Bucks. On April 28, 2008, in Game 4 of their first round series, Smith set playoff career highs of 28 points and 7 blocks in a 97–92 upset victory over the top-seeded
Boston Celtics. Despite being the 8-seed, the Hawks would ultimately push the Celtics to seven games before losing the series, and the Celtics would go on to win the
2008 NBA Finals. That offseason, on August 8, 2008, Smith signed a five-year, $58 million offer sheet with the
Memphis Grizzlies, but the Hawks quickly matched. On February 2, 2010, in a 99–106 loss to the
Oklahoma City Thunder, Smith became the youngest player (at 24 years old) to record 1,000 career blocked shots. At season's end, he was named to the
NBA All-Defensive Second Team for the first time in his career. On March 31, 2012, Smith scored 34 points and grabbed 9 rebounds in a 95–90 loss to the
Chicago Bulls. That postseason, on April 29, Smith led the Hawks to a Game 1 win over the
Boston Celtics with 22 points and 18 rebounds. However, the Hawks lost the following three games, eventually losing the series 4–2.
Detroit Pistons (2013–2014) On July 10, 2013, Smith signed with the
Detroit Pistons on a reported four-year, $54 million deal. On December 13, 2013, Smith scored 31 points and grabbed 7 rebounds in an 111–109 overtime loss to the
Portland Trail Blazers. On February 22, 2014, Smith recorded a first half career high of 24 points as he went on to finish with a season high of 32 in a 102–113 loss to the
Dallas Mavericks. He finished his first season in Detroit with averages of 16.4 points, 6.8 rebounds, 3.3 assists, 1.4 steals, and 1.4 blocks per game On October 29, 2014, during Detroit's season opener, Smith scored what would be a season high 25 points and grabbed 5 rebounds in a 89–79 loss to the
Denver Nuggets. On December 22, 2014, Smith was waived by the Pistons. In 28 games during the
2014–15 season, Smith averaged 13.1 points, 7.2 rebounds and 4.7 assists per game, while shooting 39.1% from the field, 24.3% from three-point range and 46.8% from the free throw line. In 105 career games with the Pistons, Smith averaged 15.5 points, 6.9 rebounds and 3.7 assists per game.
Houston Rockets (2014–2015) On December 26, 2014, Smith signed with the
Houston Rockets and went on to make his debut that night. In just under 32 minutes of action off the bench, he recorded 21 points, 8 rebounds and 3 assists in the Rockets' 117–111 overtime win over the
Memphis Grizzlies. Following that game, Smith was moved into the starting lineup but struggled as the Rockets won only one of their next four games. After a blowout loss to the
New Orleans Pelicans, Smith was moved back to the bench in order to help him get more comfortable with the team. During the
2015 NBA Playoffs, Smith had multiple impressive games. In Game 2 of the first round against the
Dallas Mavericks, Smith tied his playoff career-high of 9 assists, 6 of which were alley-oops to childhood friend and former AAU teammate
Dwight Howard, as he helped lead the Rockets to victory. He later scored 23 and 20 points in Games 4 and 5, respectively, as the Rockets won the series in five games. In Game 6 of the conference semi-finals against the
Los Angeles Clippers, he scored 19 points, 14 coming in the fourth quarter, as he led a comeback from 19 points down in an elimination game on the road to force, and eventually win, a decisive Game 7. During the playoffs, Smith made a career-high 38% of his three-point attempts.
Los Angeles Clippers (2015–2016) On July 16, 2015, Smith signed a one-year deal with the
Los Angeles Clippers. He made his debut for the Clippers in the team's season opener against the Sacramento Kings on October 28, recording 1 point, 6 rebounds and 4 blocks off the bench in a 111–104 win.
Second stint with Houston (2016) On January 22, 2016, Smith was traded back to the Houston Rockets, along with the draft rights to
Serhiy Lishchuk and cash considerations, in exchange for the draft rights to
Maarty Leunen. He made his return game for the Rockets later that night, recording 2 points (on 1-of-10 shooting), 5 rebounds, 6 assists, 2 steals and 3 blocks in a 102–98 win over the Milwaukee Bucks. Two days later, in his second game back for the Rockets, Smith scored a then season-high 16 points in a 115–104 win over the Dallas Mavericks. He topped that mark on February 2, scoring 19 points as a starter in a 115–102 win over the Miami Heat.
Sichuan Blue Whales (2016–2017) On November 8, 2016, Smith signed a three-month, $1.5+ million contract with the
Sichuan Blue Whales of the
Chinese Basketball Association. In his second game for Sichuan on November 16, 2016, Smith recorded 41 points, 19 rebounds, five blocks in a loss to
Guangdong Southern Tigers. In the game, he shot 7-of-18 from three-point range. He left the team in late January 2017, and in 26 games, he averaged 18.8 points, 10.6 rebounds, 3.2 assists and 2.0 blocks in 29.5 minutes per game while making only one start.
New Orleans Pelicans (2017) On September 28, 2017, Smith joined the Israeli team
Maccabi Haifa for their preseason U.S. tour, with the aim being to play in the NBA again. On October 28, 2017, Smith signed with the
New Orleans Pelicans to help the team deal with numerous injuries. New Orleans had to use the NBA hardship exemption to sign him as he made their roster stand at 16, one over the allowed limited of 15. He appeared in three games for the Pelicans before being waived on November 10, 2017. ==Big3==