Valentin Castellanos suffered a concussion last week. (Photo courtesy of MLS)

New York City FC forward Valentin Castellanos was listed as questionable for Sunday’s game at D.C. United.

Castellanos suffered a concussion in the 3-3 draw at Minnesota United last Saturday.

Center back Alex Callens has recovered from a hamstring and is eligible for selection for the match at Audi Field.

City (0-1-5, 5 points), in 11th place in the Eastern Conference, enters the game desperately needing a win. It is one of three teams without a victory this MLS season, along with the Colorado Rapids and Portland Timbers.