A 2012 graduate of Stow-Munroe Falls High School, Walker attended Northeastern University from 2012 to 2016.

[2] He represented the Miami Heat in the 2016 NBA Summer League and signed with MoraBanc Andorra of the Spanish Liga ACB in August 2016.

[3] He made 35 ACB appearances as a first-year professional player, averaging 9.0 points as well as 2.6 rebounds and 1.4 assists.

[7] In Bundesliga play, Walker was 57–133 from three-point range in the 2020–21 season, averaging 8.4 points per game.

[8] He signed a deal with fellow Bundesliga outfit MHP Riesen Ludwigsburg in August 2021.