Injury-riddled Washington also was without forward Kris Humphries, who missed his fourth straight game with a sore right knee. Star guard Bradley Beal remains out with a right leg injury, missing his 16th straight game.
Gortat had 12 points and 10 rebounds in Saturday's 105-99 win at Orlando. He is averaging 13.4 points and 9.7 rebounds in 32 games.
Nene replaced Gortat in the starting lineup on Monday night. Nene missed the victory over the Magic with a strained right triceps.