Barnes began the 2019-20 season locked in as Sacramento's top small forward, and he went on to start all 72 of the team's games. On Nov. 30, he scored 30 points in a win over Denver, adding five rebounds and two steals. On three separate occasions, all in December, Barnes grabbed a season-high 10 rebounds. On Dec. 6, the versatile forward posted 21 points, 10 rebounds and five assists during a close loss at San Antonio. All in all, the former North Carolina standout recorded three double-doubles over the course of the campaign. Barnes again poured in 30 points in a matchup against the Pelicans on Jan. 4, rounding out his line with four rebounds and three assists. On Feb. 20, Barnes exploded for a season-high 32 points during a home win over the Grizzlies, thanks in large part to hitting 7-of-11 from beyond the arc. When all was said and done, Barnes delivered averages of 14.5 points, 1.4 threes, 4.9 rebounds and 2.2 assists. He shot over 38 percent from three-point range for the fourth time in his career (38.1 percent) while hitting his field goals at a 46.0 percent clip (a four-year high) and knocking down better than 80 percent of his free throws (80.1) for a fourth consecutive season.

The 2018-19 season was Harrison Barnes' seventh year in the Association. The 26-year-old split the season between the Mavericks and the Kings. He first played 49 games, all starts, for Dallas. Barnes began the season by missing four games due to a right hamstring strain. On Nov. 12, Barnes had arguably his best game of the year, posting 23 points, five boards and four steals (matching a career-high) during a win at Chicago. Barnes posted a season-high 30 points in two December games. On Dec. 2, he generated 30 points and nine boards to help the Mavs beat the Clippers. Then on Dec. 18, he again scored 30 in a loss to the Nuggets. On Feb. 7, he was traded to Sacramento in exchange for Justin Jackson and Zach Randolph. As with Dallas, Barnes started all of his games with Sacramento. With the Kings, Barnes grabbed a career-high 14 rebounds during a Feb. 27 loss to the Buck. For the season, Barnes delivered per game averages of 16.4 points, 4.7 rebounds and 2.3 made three-pointers.

Barnes's second season in Dallas saw him once again lead his team in scoring with 18.9 points per game. The UNC product took a step forward by also leading the Mavericks with a career-high 6.1 rebounds per game. Overall, he recorded eight double-doubles, including a 22-point, 13-rebound effort against Oklahoma City on Nov. 12. Barnes scored a season-high 31 points on two separate occasions, first against Washington on Nov. 7, and then again 13 days later against Boston. He set a new career-high with six assists against Brooklyn on Nov. 29. The sixth-year pro matched the feat against Sacramento on Mar. 27 in a game where he also added 20 points. Barnes drained a season-high seven three-pointers against the 76ers on Oct. 28. In fact, for the season Barnes averaged a career-high of 1.5 made three-pointers per game. He scored 30 points twice, against Cleveland on Apr. 1 and against New York on Mar. 13. On Jan. 10, Barnes scored 25 points and added 11 rebounds against Charlotte. He made a career-high 259 free throws and shot 82.7 percent from the stripe.

In July of 2016, free agent Harrison Barnes signed a four-year contract with the Dallas Mavericks. After four seasons in Golden State, Barnes seemed eager to play a more prominent role for a new team. With Dallas, his minutes per contest peaked at a career-high 35.5 per game, and he led the Mavericks in scoring via a career-high 19.2 points per game. Barnes proved to be the unquestioned first option on offense. He shot a career-high and team-leading 16.2 attempts per game, which was 3.6 more shots per contest than teammate and future HOF-er Dirk Nowitzki. It was also 6.6 more shots per game than he took last year with Golden State. Despite the increased usage, Barnes managed to shoot 46.8 percent from the field, which was slightly higher than last season. He also hit a career-best 86.1 percent of his free throws. On Oct. 28, the second game of the season, Barnes scored a career-high 31 points, plus added five boards, in a home loss to the Rockets. On Nov. 6, Barnes registered a new career-high of 34 points, plus eight boards, two assists and two steals, in a home win over the Bucks. Barnes had five games in which he scores 30 or more points. He finished the season seventh in the NBA in minutes played (2,803) and 10th in two-point field goals (521).

In 2015-16, the injury bug caught up to Barnes after he missed only five games over his first three years in The Association. That said, Barnes still appeared in 66 games for Golden State, with 59 starts, and increased his minutes per game to a career-high 30.9. Barnes started the Warriors' first 17 games and delivered 13.4 points and 5.0 rebounds per contest. An ankle injury suffered on Nov. 27 versus Phoenix forced the versatile forward to miss 16 straight games. He returned on Jan. 4 and came off the bench to score eight points in a win over Charlotte. By Jan. 16, Barnes earned back his spot in the staring lineup and started Golden State's last 42 games. On March 30, Barnes delivered his lone double-double of the season with 15 points and 11 boards during a win at Utah. On three occasions, Barnes scored a season-high 21 points, including an April 7 win over the Spurs when Barnes posted 21 points, eight rebounds and a trio of three-pointers. The Warriors ended the regular season with an impressive mark of 73-9 and eliminated the Rockets, Blazers and Thunder on their way to the 2016 NBA Finals. They again faced LeBron James' Cleveland Cavaliers. Barnes started 23 of Golden State's 24 playoff games. His best postseason performance came in Game 3 of the Finals when Barnes tallied 18 points, eight rebounds and three assists during the loss at Cleveland. The Warriors lost the Finals in seven games.

After coming off the bench in most games during the 2013-14 season, Harrison Barnes started all 82 regular season games for the Warriors in 2014-15. The versatile forward played 28.3 minutes per contest, which was identical to last season's mark. While his minutes remained consistent, Barnes was much more efficient, improving his field goal percentage from 39.9 percent last season to 48.2 percent in 2014-15. That's a dramatic increase, especially considering Barnes took more three-point attempts in 2014-15. His effective field goal percentage of 54.8 percent ranked No. 12 in the NBA. Barnes delivered per-game career highs in points (10.1), rebounds (5.5) and three-pointers (1.1) during his third season in the NBA. On Nov. 21, Barnes recorded his first double-double of the season with 14 points and 11 rebounds, plus two blocks, in a home win over the Jazz. Barnes had a total of six double-doubles during the season. On Christmas Day, Barnes grabbed a career-best-tying 13 rebounds, plus added 12 points, three assists and two steals, in a road loss to the Clippers. On Mar. 18, Barnes exploded for a season-high 25 points, plus four boards, during a home win over the Hawks. The Warriors finished 67-15 and eliminated the Pelicans, Grizzlies and Rockets on their way to facing Cleveland in the 2015 NBA Finals. Barnes started in all 21 of Golden State's playoff games and averaged 10.6 points and 5.2 rebounds over 32.4 minutes per postseason contest. The Warriors defeated the Cavaliers in six games.

After starting all 81 of his games last season, Barnes saw his minutes per game increase while at the same time shifting to a bench role in his second season with Golden State. The versatile forward started 24 of 78 games during the 2013-14 season, but saw his minutes per game increase from 25.4 last year to 28.3 this season. Most of Barnes' counting stats improved in 2013-14, but his shooting accuracy declined. Barnes had per game career highs in points (9.5), assists (1.5), steals (0.8) and three-pointers (0.8). However, his field goal percentage decreased to 39.9 percent and his free throw accuracy went down to 71.8 percent. On Nov. 29, Barnes registered a career-high 26 points during a close loss at OKC. Barnes had 13 games with 15 points or more. On Dec. 6, Barnes swiped a career-high four steals, plus scored 14 points, in a loss at Houston. Seven days later, Barnes recorded his lone double-double of the season with 20 points, 12 rebounds and four assists in a home loss to the Rockets. On Apr. 16, Barnes posted a new career-high 30 points, plus added five boards and three assists, during a win at Denver. Golden State ended the season with a record of 51-31 and lost in seven games to the Clippers in the first round of the playoffs. Barnes came off the bench in all seven playoff games. In Game 4 of the series, a win for the Warriors, Barnes generated 15 points and four assists.

Barnes was selected by the Golden State Warriors with the 7th overall pick of the 2012 NBA Draft. The athletic forward made his NBA debut on opening night, Oct. 31, as a member of the starting lineup and generated six points with three rebounds in a close win at Phoenix. Barnes would go on to start in 81 regular season games for the Warriors and averaged 25.4 minutes per contest. The rookie produced 9.2 points, 4.1 boards, 1.2 assists and 0.6 three-pointers made per game. On Nov. 14, Barnes registered his first ever double-double with 19 points and 13 boards in a home win over the Hawks. Five nights later, he again double-doubled with 20 points and 12 boards during a win at Dallas. Another five nights later, on Nov. 19, Barnes double-doubled again with 10 points and 11 rebounds during a home win over the T-Wolves. The rookie ended the season with four double-doubles in total. Twice Barnes scored a season-high 21 points, including a 21-point, eight-rebound effort on Feb. 2 versus the Suns. Barnes' Warriors ended the season at 47-35 and eliminated the Nuggets in the first round of the playoffs, but lost to the Spurs in six games in the Western Conference Semifinals. Barnes started all 12 playoff games for Golden State, registered two double-doubles and averaged 16.1 points, 6.4 rebounds and 1.6 three-pointers per game in his first ever postseason action. In the offseason, Barnes was named a member of the 2012-13 All-Rookie First Team.