Mostert appears locked in as Miami's clear top back for Sunday's matchup against the Panthers with De'Von Achane (knee) considered week-to-week, Marcel-Louis Jacques of ESPN.com reports.
Mostert could lead the Dolphins' backfield for a significant time, with Achane reportedly a candidate to land on injured reserve. Chris Brooks and Salvon Ahmed will both be options to handle expanded reserve roles, and Jeff Wilson (ribs) looks set to have his practice window opened this week, but Mostert is the only member of Miami's running back corps capable of replicating Achane's explosiveness. Mostert already has eight total touchdowns through five contests, and two games with 100-plus scrimmage yards, making him a must-start fantasy option against Carolina's vulnerable run defense.