He helped lead Virginia Tech to a 24–8 season, with a 12–6 record in the ACC and a 4 seed in the NCAA Tournament, where they advanced to the Sweet 16.

[10] On October 22, 2019, Alexander-Walker made his NBA debut, coming off the bench in a 130–122 overtime loss to the Toronto Raptors.

[11] On November 16, 2019, Alexander-Walker scored a career-high 27 points, while getting four rebounds and three assists in a 109–94 loss against the Miami Heat.

[13] On February 27, 2020, Alexander-Walker had 23 points, four rebounds, four assists, and two steals in his first G League game, a 125–124 win over the Long Island Nets.

[17] On February 9, 2023, Alexander-Walker and Mike Conley Jr. were traded to the Minnesota Timberwolves in a three-team trade with the Los Angeles Lakers, which sent Damian Jones, Russell Westbrook and Juan Toscano-Anderson to Utah and Malik Beasley, Jarred Vanderbilt and D'Angelo Russell to Los Angeles.

[2] On May 24, 2022, Alexander-Walker agreed to a three-year commitment to play with the Canadian senior men's national team.

[22] Nickeil's cousin, Thomasi (Shai's younger brother), was a college basketball player for the Evansville Purple Aces and Northeastern Oklahoma A&M.