The veteran began the season with the Heat, appearing in 18 games and averaging 5.7 points, 2.9 rebounds, and 1.2 assists in 15.7 minutes per contest. Johnson made his season debut on Nov. 3 against Houston, playing 22 minutes and posting 17 points, four rebounds and three assists. In a Jan. 5 win over Portland, Johnson posted 12 points, six rebounds, two assists and two blocks. Against the Kings on Jan. 20, Johnson went for a season-high 22 points on 9-of-11 shooting, to go with six rebounds, three assists and two blocks. On Feb. 6, the Heat traded Johnson to the Grizzlies as part of a deal that brought Andre Iguodala to Miami. The Grizzlies subsequently traded Johnson to the Timberwolves in exchange for Gorgui Dieng. Johnson made his Grizzlies debut on Feb. 8 against the Clippers, finishing with 15 points, three rebounds, five, assists, two steals and a block in 20 minutes off the bench. The Wake Forest product appeared in 14 games for the Grizzlies before the suspension of the NBA season. In that span, he posted averages of 12.0 points, 4.7 rebounds, 3.8 assists, 1.4 steals and 1.4 blocks in 24.1 minutes per game.

The 2018-19 season marked Johnson's 10th in the league and third with the Heat. Johnson's campaign got off to a late start after he missed the first 15 games of the season while recovering from sports hernia surgery. He returned to action on Nov. 15 in a loss to the Los Angeles Lakers where he scored eight points and recorded two assists on a two-of-eight shooting night from the field. The 31-year-old shot 43.3 percent from the field and averaged 7.8 points per game while grabbing 3.2 rebounds and dishing 2.5 assists per game. Johnson's best game came on Dec. 8 against the Los Angeles Clippers when he put up 18 points, eight rebounds and three assists in 29 minutes. The 18 points would remain his season high, with Johnson matching the total again on an 18-point, five-assist, four-rebound effort in an overtime loss to the Toronto Raptors on April 7. Johnson scored in double-digits in back-to-back games against playoff teams when he notched 11 points, five rebounds and three assists against the Houston Rockets on Dec. 20 and followed it up with another 11-point outing against the Milwaukee Bucks on Dec. 22. He would also grab six boards, dish out four assists, and record one block in his team's win against the Bucks. Just four days later, Johnson would score in double digits again with 12 points and grab six boards in a two-point loss to the eventual NBA Champion Toronto Raptors. Johnson would open up January hot too, with back-to-back double-digit games including a 17-point, four rebound effort in a win against the Washington Wizards.

Johnson was a versatile part of Miami's 2017-18 playoff team. He started 41 games with the club last season after being deployed in that role only five times in his first year with the Heat. While Johnson's scoring output dipped a few notches to 10.8 points per game, his rebounding (4.9), assist (3.0) and steal (1.0) averages were all nearly identical to his previous campaign. The former Demon Deacon took fewer shots last season but was more efficient from the field, raising his field-goal percentage from 47.9 percent in 2016-17 to 50.3 percent last season. Johnson also chipped in from deep, averaging 0.8 three-pointers per contest and shooting 30.8 percent from behind the arc. Johnson posted six double-doubles on the season and fell two assists shy of a triple-double with a 10-point, 10-rebound, eight-assist performance against Portland on Dec. 13. He posted arguably his best stat line of the season in a win over Denver on March 19, pouring in a season-high 31 points while grabbing 11 rebounds and dishing out six assists. That performance was part of a strong month of March in which Johnson averaged 12.6 points per game on 59.7 percent shooting from the field. Although Miami was eliminated by Philadelphia in the first round of the playoffs, Johnson stepped up as a key offensive contributor for Miami. He played 32.1 minutes per contest in the five-game series, averaging 12.4 points, 6.0 rebounds and 4.8 assists per game while shooting 54.8 percent from the field and 53.8 percent from deep. He also contributed 1.2 steals and 1.2 blocks per game on the defensive end.

Johnson signed with the Miami Heat on a one-year contract prior to the start of the 2016-17 campaign. He played 76 games and started five of them. The forward scored a career high 12.8 points per game, to go along with 4.9 rebounds, 3.6 assists, 1.0 steals and 1.1 blocks in 27.4 minutes. Johnson debuted with the Heat in their season opener Oct. 26, posting 11 points (2-4 3Pt), two rebounds and six assists against the Orlando Magic. His best performance was March 19 against the Portland Trail Blazers, when he registered 24 points (9-13 FG), seven rebounds, five assists, two steals and two blocks in 30 minutes off bench. He scored 26 points on three occasions, and logged 11 games with 20 or more points. On Apr. 8, the forward grabbed 11 rebounds for a season high. Johnson notched four double-doubles, including a 12-assist effort on Jan. 13 to set a personal best. The Heat narrowly missed postseason play after posting a 41-41 record, but the team saw enough of a bright spot in Johnson to award him a new, three-year contract in July.

Johnson played 57 games (32 starts) for the Raptors in the 2015-16 season. The forward averaged 5.0 points, 2.2 rebounds and 1.2 assists in 16.2 minutes per game. He was limited by an ankle injury in February and logged some DNP-CD's as well. His best performance of the campaign came Dec. 18 against the Miami Heat, when he posted 13 points and five assists. On Jan. 8, the forward grabbed a season-high nine rebounds. HIs role increased slightly from 14.0 MPG in November to 17.7 in March. The Raptors finished with a 56-26 record, good for the Eastern Conference's No. 2 seed. They toppled both the Indiana Pacers and the Miami Heat in the first two rounds of the playoffs before losing to the Cleveland Cavaliers in the Conference Finals by a 4-2 margin. Johnson showed particularly well against the Cavs, scoring 10 points in Game 1 and 11 points in Game 2, both on the road. He played 10 games overall during the playoffs, averaging 3.0 points and 1.5 rebounds across 9.8 minutes per contest.

Before the 2014-15 season, Johnson signed with the Raptors on a two-year contract for his secont stint with the franchise. He played 70 games (17 starts) and averaged 7.9 points, 3.7 rebounds, 1.4 assists and 1.0 blocks in 19.6 minutes. On Feb. 21, Johnson scored a career-high 27 points on 10-of-16 shooting, adding five rebounds, four steals and four blocks against the Houston Rockets. He scored 15 or more points in 11 games, even with limited minutes. The forward notched two double-doubles, including an 11-rebound effort on Dec. 30 at the Portland Trail Blazers. In his 17 starting appearances, Johnson logged 11.3 ppg, 4.6 rpg and 1.5 apg in 26.8 mpg. The Raptors finished with a 49-33 record as Eastern Conference's 4th seed. They lost in the first round of the playoffs to the Washington Wizards (0-4). The forward played two games for a total 11 minutes, registering four points, two rebounds and one assist.

Johnson signed with the Memphis Grizzlies as a free agent in December on a one-year deal after being waived by the Atlanta Hawks in the preseason. He played 52 games, four of them as a starter. The forward averaged 7.4 points, 3.2 rebounds and 2.1 assists in 18.4 minutes per game. He made his debut for the club Dec. 17, scoring two points in four minutes against the Los Angeles Lakers. Johnson's best month was February, registering 10.7 points, 3.2 rebounds, 1.9 assists and 1.2 blocks while logging 20.5 minutes per game off the bench. His best performance was on Apr. 6, when he posted 20 points (7-11 FG), five rebounds and three assists in 32 minutes against the San Antonio Spurs. The forward scored in double figures 11 times during the campaign. He notched one double-double, logging 13 points and 10 rebounds against the Chicago Bulls on Dec. 30. The Grizzlies advanced to the playoffs after a 50-32 record, but lost to the Oklahoma City Thunder (3-4) in the first round. Johnson appeared in three games, including a 15-point, five-rebound effort in Game 6.

In the summer of 2012, Johnson was traded by the Raptors to the Sacramento Kings. He appeared in 54 games for his new team, starting 11 of them. The forward logged 5.1 points, 2.7 rebounds, 1.1 assists, 0.8 steals and 0.9 blocks in 16.3 minutes per contest for Sacramento. His best performance was on Dec. 28. In that contest, Johnson posted 17 points, seven rebounds and three assists against the New York Knicks, while hitting a game-winning three-pointer at the buzzer. On Jan. 5, Johnson blocked a season-high five shots, plus added four points, six rebounds and two steals, during a loss at Brooklyn. In his 11 games as a starter, the forward registered 6.2 points, 3.0 rebounds and 1.4 assists in 23.8 minutes per start.

Johnson played in 62 games for the Raptors, and started 40 of them in the lockout-shortened 2011-12 season. The forward averaged 9.1 points, 4.7 rebounds and 2.0 assists in 25.2 minutes per game. He also registered 1.1 steals and 1.4 blocks, both per game career highs. Johnson's best performance was on Jan. 20, when he posted 23 points, six rebounds, two assists, two steals and four blocks in 30 minutes as a starter in a loss to the Portland Trail Blazers. Four nights later, Johnson delivered 18 points, 10 rebounds and a steal during a win at Phoenix. He notched three double-doubles in the campaign, including a 22-point, 13-rebound effort on Apr. 23 against the Miami Heat. That was a personal best in rebounds for Johnson.

Johnson started the 2010-11 season with the Bulls and appeared in 13 games for Chicago. He averaged 3.2 points, 1.8 rebounds and 1.1 assists in 9.5 minutes for coach Tom Thibodeau. In late January, Chicago sent Johnson to the Iowa Energy of the D-League. In eight games for the Energy, Johnson delivered 19.3 points, 8.9 rebounds, 2.5 blocks and 1.0 steal per D-League contest. On Feb. 22, the forward was traded to the Toronto Raptors in exchange for a late first round pick. Johnson debuted for his new team one night later, registering nine points and five rebounds against the his former club. Johnson played in 25 games, all starts, with the Raptors. The 23-year old averaged 9.2 points, 4.7 rebounds, 3.0 assists, 1.0 steals and 1.1 blocks in 28.0 minutes for Toronto, nice boost relative to his time in Chicago. The forward's best performance was on Apr. 10, posting 18 points, six rebounds, six assists and three steals in 40 minutes against the New Jersey Nets.

Johnson was selected by the Chicago Bulls with the 16th overall pick in the 2009 NBA Draft. During his rookie season, the forward appeared in 65 games and started 11 of them. He averaged 3.9 points, 2.0 rebounds, 0.7 assists and 0.7 blocks in 11.6 minutes per contest. The Wake Forest product made his NBA debut on Oct. 30, with four points and three rebounds during a loss at Boston. Johnson's best performance was on Mar. 12, when he tallied 20 points, six rebounds and two blocks over 42 minutes against the Miami Heat. For the season, Johnson appeared in 65 games with 11 starts. The Bulls advanced to the playoffs after a 41-41 record and lost to Cleveland in the first round of the playoffs. Johnson appeared briefly in four postseason games and delivered one rebound and one assist.