[4] Brantley worked out for several NBA teams after his college season ended, including the Boston Celtics, Brooklyn Nets, Charlotte Hornets, Los Angeles Clippers, Minnesota Timberwolves, and Phoenix Suns.

[6] On October 25, 2019, Brantley made his debut in NBA, coming off from bench in an 86–95 loss to the Los Angeles Lakers with three rebounds, an assist and a block.

[7] On January 15, 2020, Brantley tallied 28 points, eight rebounds and five assists for the Salt Lake City Stars in a loss to the Maine Red Claws.

[8] On February 11, Brantley flirted with a triple double, contributing 26 points, 14 rebounds and eight assists in a 112–108 overtime win over the Texas Legends.

[13] On March 11, 2022, Brantley was acquired via waivers by the Greensboro Swarm,[14] playing 10 games and averaging 10.2 points, 5.6 rebounds, 2.5 assists and 1.4 steals.