Jackson is dealing with a right ankle injury that has sidelined him for the past two games.
Tyler Huntley, who was activated off the reserve/COVID-19 lid Thursday morning, was expected to take the first-team reps.
Jackson hasn’t played since injuring his ankle on Dec. 22, when Baltimore lost at Cleveland, 24-22. After sitting out for 17 days, Jackson practiced on Wednesday but had a pronounced limp. He had trouble jogging while moving from drill to drill.
The Ravens (8-7) have lost three straight games and is facing an essentially must-win game against the Los Angeles Rams on Sunday.