D.C.'s leading scorer and MLS's co-leader in assists hurt his right knee last week at Montreal.
Luis Silva recorded a first-half hat trick and Fabian Espindola added three assists as United won at Montreal, 4-2.
United aims for first place in MLS's Eastern Conference when it hosts the Columbus Crew at FedEx Field on Saturday.
Spain at RFK. El Salvador's arrival. U.S.-Nigeria tickets in Jacksonville. World Cup friendlies on TV. Reggae Boyz. D.C. United. Washington Spirit.
Fabian Espindola's first-half goal lifted United into second place in MLS's Eastern Conference.
Honduras vs. Turkey at RFK Stadium. Mexico video. U.S. Open Cup results. Chivas USA's attendance record. NWSL. Trick-shot video. ESPN promo.
MLS referee Juan Guzman erred in red-carding Eddie Johnson, who will now be allowed to play against Sporting KC on Saturday.
Most United players are supporting the United States in the World Cup, but some have ties to other teams.
MLS may end up reviewing Eddie Johnson's red-card suspension. Plus, injury updates, Michael Seaton's rise and Champions League draw.
Fabian Espindola scores his team-best sixth goal, but United concedes Diego Fagundez's go-ahead strike in the 77th minute.