The Wizards and Hawks played close all night from the Verizon Center, battling back and forth with neither team leading by double digits the whole night.
The Wizards had a chance to win the game in regulation after Barron's three-pointer, but Jordan Crawford's attempt at a game-winning three pointer of his own went begging, forcing the overtime.
In the overtime, it was all Hawks, as Atlanta did enough from the free-throw line to seal its 15th win of the season.
Crawford kept the Wizards in the game on Tuesday, going for a triple-double of 27 points, 11 rebounds and 11 assists to lead a Washington squad looking for its fourth win of the season. Bradley Beal, who left the game for a while after a hard fall to the floor on a dunk attempt, added 17 points as part of the effective back court duo on the night.
Nene, coming off the bench, added a key 18 points and four rebounds. But it was not enough, as Atlanta used Josh Smith's 17 points and 13 rebounds and shooting guard Louis Williams' 24 points off the bench to hold off Washington.