The Dolphins are signing Fuller (knee) to a two-year, $16.5 million contract Thursday, Jeremy Fowler of ESPN.com reports.
Fuller (knee) was placed on injured reserve Friday.
Fuller (knee) has been ruled out ahead of Sunday's game against the Cowboys, John Keim of ESPN.com reports.
Fuller (knee) is out for Sunday's game versus the 49ers, Nicki Jhabvala of The Washington Post reports.
Fuller (knee) does not carry an injury designation into Sunday's game at the Giants.
Fuller (knee) did not participate at the Commanders' practice Wednesday.
Fuller recorded eight tackles (two solo), three passes defensed and an interception in Sunday's 37-3 loss versus Buffalo.
Fuller is entering the final year of his contract, Luke Jackson of Press Box reports.
Fuller finished 2021 with 77 tackles, 16 pass defenses, one interception and one sack in 16 games.
Fuller (illness) was activated from the reserve/COVID-19 list Friday.