Oklahoma City Thunder / Oklahoma City Blue (2017–2018) After going undrafted in 2017 NBA draft, Dozier signed with the Los Angeles Lakers for the 2017 NBA Summer League. He signed a contract with the Dallas Mavericks on August 8, 2017. He was released on October 14, 2017 before agreeing to a two-way contract with the Oklahoma City Thunder two days later. Under the terms of the deal, Dozier split time between the Thunder and their NBA G League affiliate, the Oklahoma City Blue. Dozier would make his NBA debut on February 8, 2018 in a loss to the Los Angeles Lakers. Boston Celtics (2018–2019) On August 21, 2018, Dozier signed a two-way contract with the Boston Celtics. In February 2019, Dozier was named to the All-NBA G League team, the equivalent of All-Star. On June 30, 2019, the Celtics declined to extend his contract, thus making him an unrestricted free agent. On July 4, Dozier was included in the Philadelphia 76ers' Summer League team. Denver Nuggets (2019–present) On August 13, 2019, Dozier signed a one year contract with the Denver Nuggets. He was assigned to the Windy City Bulls for the start of the NBA G League season. On January 11, 2020, Dozier had a game-high 32 points, nine assists, eight rebounds, two steals and one block in a 120–112 win over the Fort Wayne Mad Ants. In his Denver debut on January 15, Dozier finished with 12 points as he filled in for the injured Jamal Murray.

In his senior season at Spring Valley High School, he was named to the 2015 McDonald's All-American Boys Game roster and scored 14 points. He committed to South Carolina. ESPN ranked him the 21st best recruit in his class. His father, Perry Dozier, was a basketball player for South Carolina in the 1980s. In his sophomore season, along with Clippers forward Sindarius Thornwell, Dozier was an important part of South Carolina's improbable Final Four appearance. He scored 21 points against Marquette in the NCAA Tournament. Dozier was named to the East Region All-Tournament Team. In the 77–73 loss to Gonzaga in the Final Four, Dozier had 17 points. At the conclusion of his sophomore season, Dozier announced his intention to forgo his final two seasons of collegiate eligibility and declare for the 2017 NBA Draft.