Jackson sustained a head injury in Sunday's loss to the Giants. Jackson, the only player in the NFL with two interceptions and two sacks, appears on track to play Sunday as the Browns (0-5) host Cincinnati. Jackson recorded three sacks and a pick when the Browns lost to the Bengals last month.
Linebacker Scott Fujita was not on the field Thursday during the 15 minutes open to reporters. Fujita is listed on the injury report with a shoulder issue.
Defensive tackle Ahtyba Rubin is also out with a lower leg injury.