Jackson (ankle) isn't practicing Friday, making him unlikely to play Sunday at Cleveland, according to Brian Wacker of The Baltimore Sun.
Jackson still hasn't practiced since injuring his ankle Week 4 against the Titans. Ravens head coach Jesse Minter has said that Jackson doesn't necessarily need to practice in order to play, but it's still not a good sign to miss another practice. Tyler Huntley will make his second start of the year if Jackson isn't ready.