He is the son of former NBA player Duane Washington, he played college basketball for the Ohio State Buckeyes.

On September 20, 2017, Washington committed to play college basketball for Ohio State over offers from teams such as Michigan, UCLA, and Butler.

[8][9] He, along with small forward Luther Muhammad, were suspended for the Nebraska game on January 14, 2019, for "failure to meet program standards".

[10] In the final seconds of Ohio State's overtime 2021 NCAA tournament first-round matchup against Oral Roberts, Washington missed what would've been a buzzer–beating three–pointer to tie the game and force double–overtime.

[14] After going undrafted in the 2021 NBA draft, Washington signed a two-way contract with the Indiana Pacers on August 5, 2021, splitting time with their G League affiliate, the Fort Wayne Mad Ants.

[29] On January 3, 2024, Washington signed another two-way contract with New York, joining the team for the 2024 playoffs, however did not make an appearance.

The Timberwolves acquired Keita Bates-Diop, Donte DiVincenzo, Julius Randle, and one lottery protected first-round pick; the Hornets also received Charlie Brown Jr., DaQuan Jeffries, three second-round picks and draft compensation while the Knicks acquired Karl-Anthony Towns and the draft rights to James Nnaji.

[38] Washington's cousin, Setric Millner Jr., is a basketball player and the two lived together while they attended Grand Rapids Christian High School.