Larsen (kneecap) was placed on injured reserve Monday, Nicki Jhabvala of The Washington Post reports.
After suffering a dislocated kneecap in the Commanders' Week 13 tie with the Giants, Larsen will now be forced to miss at least four contests while on IR. The 31-year-old still has a shot to return to the field if Washington makes the postseason, but in the meantime, Nick Martin will likely take over at starting center moving forward.