Miller, who appeared in one game for the Bears (two catches, six yards), started 14 games for the Houston Texans in 2018. The 29-year-old is looking to regain his footing in the league after suffering a torn ACL during the 2019 preseason.
The Miami product originally began the year as a member of the New England Patriots but was placed on the physically unable to perform list ahead of the season before being released in early September.
In his last full year, the tailback rushed for 973 yards on 210 carries with five touchdowns.
Washington (6-7) suddenly finds itself lacking depth in its backfield with Antonio Gibson sidelined due to a toe injury. The Football Team's starting running back missed Week 14 and didn't practice Wednesday, leaving his availability for Sunday against the Seattle Seahawks in question. Bryce Love remains on IR, so J.D. McKissic and Peyton Barber have been carrying the load.
Miller provides a veteran option for head coach Ron Rivera.
The 2018 Pro Bowler will need to complete the league's six-day, pre-entry COVID-19 testing before the deal becomes official. That leaves Miller unlikely to play Sunday, depending on when he began his screening.