The former Pro Bowler has suffered a myriad of injuries over the past few years, and in an announcement Monday, he cited his body can't take "the punishment" that the NFL demands anymore.
Foster's agent confirmed the news to NFL Network Insider Ian Rapoport. A source added to Rapoport that Foster's retirement is effective immediately. Jay Ajayi has taken over the Dolphins RB job as Foster was trying to come back from a hamstring injury. Looks like Damien Williams and Kenyan Drake will move up on the depth chart.