He then signed a two-way contract with the Golden State Warriors the following season, winning an NBA championship with the team in 2022.

Lee graduated from Calvert Hall College High School in Towson, Maryland,[2] where in his final season he was a Second-Team Baltimore Sun All-Metro and a First-Team All-Baltimore Catholic League selection.

Lee attended prep school at St. Thomas More in Oakdale, Connecticut, where he averaged 17 points, 6 rebounds and 5 assists per game during the 2010–11 season.

In his freshman season as a member of the 2011–12 Drexel Dragons men's basketball team, Lee started at point guard.

The following season, Lee was named to the Second-Team All-CAA after leading Drexel in scoring and finishing third in the CAA averaging 17.1 points per game.

In his third season at Drexel, after being selected to the Preseason CAA All-Conference First Team, Lee suffered a torn ACL in a game against Arizona.

Before his redshirt junior season at Drexel, Lee was named to the Preseason CAA All-Conference First Team for the second year in a row.

[6] At the conclusion of the regular season, Lee was one vote shy of winning CAA Player of the Year, losing to Senior William and Mary guard Marcus Thornton.

[8] On April 23, 2015, Lee announced he would play his final collegiate season at Louisville under head coach Rick Pitino.

[15] On October 31, he was acquired by the Maine Red Claws of the NBA Development League as an affiliate player of the Celtics.

[25] On October 28, Lee recorded a double-double with a career-high 23 points, 11 rebounds and two assists in a 134–123 road victory over the New Orleans Pelicans.

[32] On October 19, 2022, Lee made his Suns debut, putting up 11 points, two rebounds, two assists, and an off-balance, game-winning baseline jumper in a 107–105 win over the Dallas Mavericks.

[37] On February 22, 2018, Lee was added to the United States national team for the 2019 FIBA Basketball World Cup qualification.

[38] Lee earned a degree in general humanities and social science at Drexel and majored in special education, with a concentration in assistive technology at Louisville.