Magee (undisclosed) did not participate in Tuesday's practice, John Keim of ESPN.com reports.
Magee does not currently have a return timeline set. The Commanders signed an additional linebacker Tuesday morning, meaning Magee could be set to miss an extended period of time. If the 25-year-old must work his way back from a significant issue, Kain Medrano or Krys Barnes could see additional reps during Saturday's preseason showdown with the Lions.