D.C. United captain Steven Birnbaum will miss Saturday's game at FC Cincinnati with a hip injury, the team confirmed Friday.
The veteran defender left early in the second half of last weekend's game against Charlotte FC following several hard challenges before intermission.
Birnbaum, 32, has recorded one goal in 10 MLS games (nine starts) this season, his 10th year with D.C. United.
It isn't clear whether Birnbaum will travel to face the New York Red Bulls in Tuesday's U.S. Open Cup round of 32.
Birnbaum was the No. 2 overall selection by D.C. United in the 2014 MLS SuperDraft. He has 13 goals and five assists in 236 career matches (230 starts).
Last week, he signed a two-year contract extension through the 2025 season.
More must-reads: