[3] In first season at Georgia State, Washington shot a league-leading 65.6 percent from the floor, the second best mark in school history.

[3] In the Panthers' regular season opener, Washington tied a school record with nine blocked shots against Southern Poly, adding seven rebounds and six points in 22 minutes of action.

[3] As a senior at Georgia State in 2014–15, Washington earned All-Sun Belt Preseason Third-Team honors.

[3] Early in the season at the CBE Hall of Fame Classic, Curtis scored 11 points, going 7-of-7 from the free throw line against Chicago State.

In the postseason, Washington recorded seven points and five rebounds in the Panthers' come-from-behind NCAA tournament second-round upset over No.

In August 2015, Washington signed with Instituto Atlético Central Córdoba of the Argentinian Liga Nacional de Básquet.

On October 31, 2015, Washington joined the Maine Red Claws of the NBA Development League for training camp.

[9] He made the Red Claws' opening-night roster, but he was deactivated by the team on November 11, 2015, prior to their season opener.

[13] He appeared in eight games for the Lightning before parting ways with the team in late January 2016; he averaged 5.1 points and 2.0 rebounds during his stint.

After a stint with San Carlos of the Dominican Republic, Washington moved to Saudi Arabia in October 2016 and joined Al-Fateh.

[1] He made his debut for the Giants in their season opener on March 16, 2017, scoring 12 points on 5-of-12 shooting to go with four rebounds, one steal and one block in 28 minutes as a starter in a 96–58 loss to the Southland Sharks.

[20] The following day, he joined the Taranaki Mountainairs for the rest of the season and made his debut that night,[21] recording six points and six rebounds off the bench in a 97–67 loss to Southland.

[27][28] In his debut for the Flames on April 20, 2018, Washington recorded 21 points and nine rebounds in a 95–83 win over the East Perth Eagles.

In May 2019, Washington had a one-game stint with the NLEX Road Warriors of the Philippine Basketball Association as a temporary import during the 2019 PBA Commissioner's Cup.

[33] On October 26, 2019, Washington was selected by the Maine Red Claws in the fourth round of NBA G League draft.