The Jaguars placed Jackson (personal) on the reserve/retired list Tuesday.
Jackson signed with the Jaguars in early June after being released by the Bills but has decided to retire from football. The cornerback played in 55 regular-season games, and totalled 178 tackles (144 solo), 30 passes defensed and three interceptions. The 29-year-old's last game was the Bills' 33-30 overtime playoff loss to the Broncos. Jackson played one defensive snap in the contest and gave up a 26-yard touchdown to Marvin Mims with 55 seconds left in regulation. The Jags signed cornerback Corey Ballentine in a corresponding move.