Seattle Seahawks running back Chris Carson is walking away from the NFL -- the 27-year-old is reportedly retiring due to a neck injury.
Carson suffered the injury during Week 4 of the 2021 season ... and has been unable to suit up for a game since.
NFL Network reporter Ian Rapoport says Carson was working out in hopes of getting better ... but at this point, there hasn't been enough progress.
The report states Carson will not officially file his paperwork .