Butler is recovering from a concussion ahead of the Commanders' matchup in London against the Colts in Week 4, Ben Standig of The Team 980 Washington D.C. reports.
It's not immediately clear when Butler suffered the concussion, but his availability for Week 4 is now up in the air. In the event he can't suit up against Indianapolis, Tyler Owens could be in line to see a few snaps in the secondary.