The 49ers did not lose a sure thing with Jarryd Hayne's retirement, but it does raise some questions about two position competitions.
I suppose the snarky response to this question is "nothing." But even though Jarryd Hayne only had one year of experience under his belt, there is still plenty to consider on offense and special teams. I had Hayne earning a spot in my first 53-man roster projection, but he was certainly a bubble candidate, as opposed to a lock.
Hayne played running back and did return work last season. He flashed some skills at both positions in the preseason.