Bullock appeared in 29 games for the Knicks during the pandemic-shortened 2019-20 season. It was his first season with New York. In 23.6 minutes per game, he averaged 8.1 points, 2.3 rebounds and 1.4 assists. He shot 40.2 percent from the field, hit 1.3 threes at 33.3 percent and drilled 81.0 percent of his free throws. Back problems delayed his season debut to Jan. 1, when Bullock drained three three-pointers and scored 11 points in 15 minutes during a home win over the Trail Blazers. Bullock set single-game season highs of 21 points, five rebounds, five assists, five threes, three steals and one block. Arguably his best overall performance of the season occurred Jan. 10 against the Pelicans. In 27 minutes, Bullock posted 15 points (6-11 FG, 2-6 3Pt, 1-2 FT), three steals, two rebounds and two assists with no turnovers. On Feb. 9, the sharp-shooter hit a season-high five three-pointers and scored a season-high 21 points during a close loss at Atlanta. Bullock had 10 performances with double-digit points, nine performances with at least two made threes, 12 performances with at least three rebounds and 11 performances with at least two assists. He also had 16 games with at least one steal and three games with at least one block.

The 2018-19 season marked Bullock's sixth year in the league, and he tied his career high in points (11.3 per game), while setting highs in assists (2.0 per game), rebounds (2.7 per game), free throws (1.2 makes per game), three-pointers made (2.3 per game) and minutes (29.8 per game). Bullock is known for his three-point game, shooting 39.2 percent for his career. His free-throw efficiency is also impressive, shooting 82.8 percent for his career. He improved it from 79.6 percent in 2017-2018 to 85.9 percent in 2018-19. Bullock had a very strong four-game stretch from Dec. 15 through Dec. 21, averaging 20.8 points, 2.8 rebounds, and 1.5 assists on 54.5 percent from the field and 51.4 percent from three-point range. He had a season-high 33 points, shooting 7-of-12 from three in a win against Minnesota during this stretch. He had another strong stretch from Jan. 2 to Jan. 18 when he scored double-digits for nine straight games and two games scoring 19 points. In February, Bullock was traded to the Los Angeles Lakers, playing his first game with the new team on Feb. 10. Bullock remained consistent from the floor with his new team, shooting nearly identical field-goal percentages (41.3 percent with Detroit, 41.2 percent with Los Angeles). He was a key part of the roster after the trade, starting 16 of the 19 games he played for the Lakers. The Lakers needed a three-and-D scorer, and Bullock was praised by teammate LeBron James saying, "We love everything he brings on the defensive end [and] his ability to knock down shots." He demonstrated this by scoring 18 points, dishing three assists, and grabbing three rebounds while shooting 4-of-6 from beyond the arc during a 28-point win over the Pelicans on Mar. 31.

For the 2017-18 season, Reggie Bullock returned to Detroit after appearing in only 31 games last season due to various injuries. This year, Bullock's role grew substantially as the season progressed. After seeing minimal playing time early in the season, Bullock carved out a significant role from mid-December onward. He ended up starting 52 of his career-high 62 games played. Bullock averaged a career-high 11.3 points per game. By comparison, his previous high-water mark was 4.5 points. Bullock poured in 20 or more points in eight different occasions. On Dec. 17, Bullock scored a career-high 20 points, to go with five rebounds, during a win over Orlando. On Dec. 30, Bullock delivered a new career-high 22 points in a win over the Spurs. Bullock also proved to be an asset in other areas. Bullock's per game averages of 2.5 rebounds, 1.5 assists and 0.8 steals were all also career highs. Yet Bullock's most impressive trait was his ability to shoot the three-ball. The University of North Carolina product knocked down 2.0 threes per game while draining a remarkable 44.5 percent of his shots from downtown.

The 2016-17 campaign marked Bullock's second year with the Pistons and his fourth in the league. Unfortunately, Bullock battled multiple injury issues throughout the season. During preseason, it appeared that Bullock would be the back-up to Kentavious Caldwell-Pope at shooting guard. However, back spasms forced Bullock to miss Detroit's first 12 regular-season games. He made his season debut Nov. 18 and chipped in five points during a loss at Cleveland. That started a four-game playing streak for Bullock. But, on Nov. 23, Bullock was forced from a game with a knee injury. Two days later, he was diagnosed with a torn meniscus in his left knee. Surgery was performed Dec. 4,with Bullock slated to miss four-to-six weeks for recovery. On Jan. 13, Bullock returned to the hardwood and supplied seven points, three assists and two steals during a loss at Utah. The sharpshooter would play in eight straight games before an illness and then a right foot sprain forced Bullock to miss occasional games in February and March. On April 12, Bullock scored a career-high 17 points during a loss at Orlando. Overall, Bullock appeared in 31 games (five starts) for the Pistons and posted per-game averages of 4.5 points, 2.1 rebounds, 0.9 assists, 0.6 steals and 0.9 made three-pointers over 15.1 minutes per contest. All of those figures were career highs.

In July 2015, Reggie Bullock was traded by Phoenix with Danny Granger and Marcus Morris to the Detroit Pistons for a 2020 second-round draft pick. Detroit would now be Bullock's third NBA team in three seasons. Detroit eventually offered Bullock more playing time, though it took a while for the wing to convince the Pistons' brass that he deserved the opportunity. From the season's start to Dec. 18, Bullock appeared in 14 of Detroit's first 28 games and averaged 0.4 points over 5.6 minutes per contest. The Pistons sent Bullock to the D-League Grand Rapids Drive for one game of extra playing time. Bullock shined, producing 29 points, five rebounds, four assists and four steals in a Dec. 19 contest with the Drive. He returned to the Pistons, but playing time was still hard to come by. On Feb. 10, Bullock had surgery to repair a broken nose. Finally, during a Feb. 24 blowout win over Washington, Bullock received 26 minutes of playing time and delivered a career-high 16 points on 6-for-9 shooting. From Feb. 24 to March 19, Bullock appeared in 12 of Detroit's 13 games, averaging 7.0 points over 19.4 minutes per contest. For the season, Bullock appeared in 37 games for Detroit and generated 3.3 points, 1.8 rebounds and 0.6 made threes over a career-high 11.6 minutes per game. Detroit made the playoffs, but it lost to Cleveland in the first round. Bullock appeared in the team's first two playoff games before a nerve issue in his left leg forced him to miss the Pistons' last two postseason contests.

The 2014-15 season was one of challenge and change for the second-year guard. He started the season with the Clippers. Bullock played in 12 of the Clippers' first 17 games and averaged 3.2 points and 10.0 minutes per contest. On Nov. 3, Bullock posted what would be a season-high 12 points on his first appearance of the season. An early December ankle injury forced the outside shooter to miss eight of LA's next nine games. From Dec. 20 to Jan. 11, Bullock appeared in 12 straight games for the Clippers. On Jan. 3, Bullock delivered 10 points and four rebounds in a win over the Sixers. Then on Jan. 15, the wing was traded to the Phoenix Suns as part of a three-team deal that saw Austin Rivers join the Clippers. In 25 games with Los Angeles, Bullock averaged 2.6 points, 1.6 rebounds and 0.6 made three-pointers over 10.5 minutes per game. Unfortunately, Bullock would see less playing time with Phoenix. The Suns sent Bullock to the Bakersfield Jam of the D-League for two separate stints in late January and February in order to give a him a run of extended play. In four games with Bakersfield, the wing averaged 23.8 points, 9.8 rebounds and 3.0 made three-pointers over 35 minutes per contest. But with Phoenix, playing time was hard to come by. From Feb. 20 to Apr. 10, Bullock appeared in nine of the Suns' 26 games, averaging just 7.9 minutes per contest.

Reggie Bullock was drafted in the first round (25th overall) by the Los Angeles Clippers in the 2013 NBA Draft. He made his NBA debut on Opening Night, Oct. 29, scoring two points in a loss to the Lakers. As a rookie, he appeared in 17 of the Clippers' first 21 games. A sprained right ankle then forced Bullock to miss 26 games in December through early February. He filled a minor role off the bench for 11 straight games from Feb. 7 to March 6. The rookie subsequently appeared in just 10 of the the Clippers' last 19 games. On March 16, Bullock posted a career-high 14 points in a blowout win over Cleveland. All in all, Bullock appeared in 43 games for Los Angeles. He posted per-game averages of 2.7 points, 1.3 rebounds and 0.5 made three-pointers over 9.2 minutes per contest. The Clippers finished 57-25 and beat the Warriors in the first round of the playoffs. They then lost to the Thunder in the second round. Bullock appeared in two of the Clippers' 13 playoff games, totaling two points and one assist.