The Commanders signed Johnson to a two-year contract Monday, John Keim of ESPN.com reports.
Johnson appeared in 11 (four starts) games during the 2022 season and recorded 29 tackles (20 solo), a sack and an interception.
Johnson signed to Washington's practice squad Wednesday, Nicki Jhabvala of The Washington Post reports.
Johnson was forced out of Sunday's game against the Giants with a hand injury, Kareem Copeland of The Washington Post reports.
Johnson (knee) worked out on the side of Sunday's practice, Kareem Copeland of The Washington Post reports.
The Redskins placed Johnson (knee) on their Physically Unable to Perform list Wednesday, Kareem Copeland of The Washington Post reports.
Johnson (finger) is not a full participant in OTAs, Kareem Copeland of The Washington Post reports.