He played one season of college basketball for Syracuse before being selected by the Charlotte Hornets with the 22nd overall pick in the 2016 NBA draft.

[4] Richardson played one season of college basketball for Syracuse, averaging 13.4 points, 4.3 rebounds and 2.1 assists per game.

[23] On November 30, 2019, Richardson recorded a career-high 24 points, while shooting 6-of-7 from three-point range, along with five assists in a 109–95 win over Ironi Nahariya.

[25] On December 16, 2019, Richardson signed with Vanoli Cremona in the Italian Lega Basket Serie A as a replacement for Vojislav Stojanović.

[26] However, he had an unfortunate experience in Cremona: one month after his debut with the team he fractured his right hand[27] during the match against Virtus Roma on January 26.

[30] For the 2020–21 season, Richardson joined the Canton Charge of the G League[31] where he played 15 games, averaging 8.4 ppg while shooting 46% from beyond the arc.