The Lions boast maybe the best duo of RB's in the NFL. While Jahmyr Gibbs has been remarkably healthy, his counterpart David Montgomery is coming off a knee injury. Health is always a concern at this position because any injury to any body part can be hard to play through.

Although opportunities have continued to shrink as the roster grows stronger, the Detroit Lions have had at least one rookie play a significant role in each of the last four seasons under head

With NFL training camp season upon us, Kevin Patra provides a refresher on the Detroit Lions' roster changes, position battles and notable subplots.