The 2019 NFL MVP has not played or practiced since December 12. If Jackson does not get any work in during Friday's session, it's unlikely he'll be able to play this Sunday.
This would leave backup Tyler Huntley, who played well in place of Jackson last weekend, lined up to start a critical divisional matchup against the Cincinnati Bengals.
It's not the ideal situation for the Ravens, but Huntley has enough ability to leave Baltimore fans--and his fantasy owners--happy.
The Ravens and Bengals will kick off at 1 p.m. ET on Sunday. Both teams are 8-6 and tied for first place in the AFC North.
Cincinnati currently holds the tiebreaker by virtue of its win over the Ravens in October.