Washington Jr. spent his first season with the Indiana Pacers. In 48 games with the pacers, Washington Jr. averaged 20.2 minutes, 9.9 points, 1.7 rebounds, and 1.8 assists. Washington Jr. played his second season with the Phoenix Suns. In 31 games with the Suns, Washington Jr. averaged 12.2 minutes, 7.9 points, 1.2 rebounds, and 2.0 assists. On January 3, 2024, Washington Jr. signed a two-way contract with the Knicks, spending most of his time with the Westchester Knicks (Knicks G League Affiliate).

Washington Jr. spent three seasons with Ohio State. In 94 career games with the Buckeyes, Washington Jr. averaged 24.4 minutes, 11.4 points, 2.9 rebounds, and 1.8 assists.