Since entering the league as an undrafted rookie, Jackson has spent time with the Colts, Texans and Browns but didn't suit up for an NFL game. The Browns have a solid corps of cornerbacks, so Jackson will vie for a special-teams role next season.
Jackson was placed on the practice squad/injured list Thursday due to a hamstring issue.
Jackson's placement on the injured list allowed the Browns to sign fellow defensive back Ashton Lampkin to their practice squad. Jackson has yet to make his NFL debut, which will now likely have to wait until 2019 if he's able to eventually stick on an active roster.
Jackson worked out for the Texans on Monday and was signed to the team's practice squad, Aaron Wilson of the Houston Chronicle reports.
Jackson suffered a concussion during the preseason while with the Colts before being waived last week. He'll offer some insurance at cornerback, a position where the Texans have been hit hard by injury.
The Colts waived Jackson (concussion) off injured reserve Thursday, Andrew Walker of the team's official site reports.
Jackson suffered a concussion during Indianapolis' preseason finale, was subsequently placed on injured reserve and has now been waived. The reserve cornerback will be a free agent if he clears waivers and will look to land another job elsewhere in the league.